Lower Rate Of Preterm Birth Research Articles

The impact of caregiver and intended mode of birth on the public cost of care: Cost analysis of maternity and neonatal care in New Zealand

ProblemWomen who receive midwifery continuity-of-care require fewer interventions, generating significant cost savings for health services. Existing cost models were based on studies including low-risk pregnancies, limiting generalisability. BackgroundNew Zealand (NZ) is the only high-income country with a fully integrated midwifery continuity of care model facilitating study of real-world costs by model of care. AimTo compare healthcare utilisation and pregnancy-related public healthcare cost for private obstetricians and other community maternity caregivers (GPs, midwives), and planned caesarean compared to intended vaginal birth, within the NZ continuity-of-care maternity system. MethodsPopulation-based cohort study including singleton pregnancies under private obstetrician and community maternity care with live birth January 2016 - June 2020. Administrative data were used to identify healthcare utilisation and associated cost for mothers and their infant(s) until 1 year post birth, using generalised linear model techniques. Findings248,424 singleton pregnancies were included. Adjusted mean costs were significantly higher for private obstetricians than community maternity caregivers (mostly midwives) ($1,096, 95 % CI $813 – 1,378). Elective caesarean section was more costly than intended vaginal birth ($4,316, 95 % CI $4,105 – 4,527). Within each intended mode of birth, pregnancies cared for by private obstetricians were more costly than community maternity caregivers. DiscussionConsistent with existing literature, continuity of care by independently practicing midwives was less costly in NZ after adjustment for demographic and clinical differences. ConclusionsFunding structures and population pregnancy risk profile are important considerations in the implementation of midwifery-led continuity of care models. Statement of significanceProblem: Health systems seek to improve maternity care and contain healthcare budgets.What is already known: Women cared for by continuity-of-care midwives experience lower rates of preterm birth, obstetric intervention, and improved satisfaction compared to other models of care. It has been reported as cost-effective in a clinical trial setting among low-risk women.What this paper adds: This study uses real-world data from New Zealand, the only country with fully integrated midwifery continuity-of-care, to establish that midwifery care is cost-saving for public healthcare systems compared to maternity care provided by private obstetricians, when adjusted for obstetric risk factors.

P-745 effectiveness and safety of consecutive single embryo transfer compared to double embryo transfer: results from UK HFEA registry

Abstract Study question How does two-consecutive single embryo transfer (2xSET) affect reproductive outcomes of in-vitro fertilisation (IVF) and intracytoplasmic sperm injection (ICSI) compared to double embryo transfer (DET)? Summary answer 2xSET may provide greater or comparable live birth rates with lower multiple birth, preterm birth, and pregnancy loss or neonatal death rates compared to DET. What is known already Elective single embryo transfer (SET) in IVF/ICSI is widely encouraged over DET to minimise the risk of multiple birth and associated morbidities. Despite this, UK multiple birth rates following IVF remain higher than spontaneous conception, with 5% of IVF pregnancies resulting in multiple birth compared to 0.4%-1.2% multiple gestation rates following spontaneous conception. Owing to advancements in cryopreservation techniques, live birth and ongoing pregnancy rates are now comparable between fresh and frozen embryo transfer. Consequently, 2xSET has been suggested as an alternate technique to achieve comparable live birth rates with fewer multiple gestation pregnancies compared to DET. Study design, size, duration This retrospective cohort study was conducted using Human Fertilisation and Embryology Authority (HFEA) register data, which encompasses national data from all IVF clinics in the UK. Within this analysis, all women who underwent their first oocyte collection and IVF or ICSI treatment cycle with subsequent SET, DET or 2xSET between 2010 and 2019 using either blastocyst or cleavage stage embryos were included (N = 125,149). Participants/materials, setting, methods This national retrospective cohort study utilised UK HFEA register data from 2010-2019, including all women who underwent their first oocyte collection and subsequent embryo transfer (N = 125,149). The rate of live birth, multiple birth, preterm birth, and pregnancy loss or neonatal death was compared between SET, DET, and 2xSET IVF/ICSI pregnancies using either blastocyst or cleavage stage embryos, and was stratified by maternal age. Data analysis was conducted in RStudio v4.2, alpha equals 0.05. Main results and the role of chance 2xSET pregnancies following blastocyst-stage transfer achieved a greater live birth occurrence rate of 0.47 (0.13) (median (interquartile range)) than SET, 0.41 (0.13), and DET, 0.38 (0.13) (P < 0.05). When using SET as a reference standard, 2xSET achieved a lower multiple birth rate, odds ratio (OR) of 6.87 (95%CI 6.14-7.68), than DET, OR 28.20 (95%CI 25.20-31.57), and lower preterm birth rate; OR 1.11 (95%CI 1.06-1.15) in 2xSET, and OR 2.80 (95%CI 2.67-2.94) in DET. Pregnancy loss or neonatal death rate was also lower in 2xSET, OR 1.14 (95%CI 1.08-1.21), compared to DET, OR 2.11 (95%CI 1.98-2.24). Conversely, in cleavage-stage embryo transfer pregnancies, no significant difference in live birth occurrence rate was observed, achieving rates of 0.27 (0.21) for SET, 0.26 (0.13) for DET, and 0.29 (0.18) for 2xSET. 2xSET was less likely to result in multiple birth than DET, OR 0.14 (95%CI 0.11-0.19). Moreover, when using SET as a reference standard, 2xSET was less likely to result in preterm birth than DET, OR 1.02 (95%CI 0.87-1.23) and 2.48 (95%CI 2.17-2.82) respectively, as well as pregnancy loss or neonatal death, OR 1.07 (95%CI 0.85-1.35) and 2.03 (95%CI 1.70-2.42) respectively. Limitations, reasons for caution Certain confounders are not recorded within HFEA registry data, including patient body mass index (BMI), evaluation of embryo quality, and endometrial thickness at embryo transfer. Consequently, while our analysis identifies broad trends in embryo transfer success and morbidity, results may differ within certain patient populations. Wider implications of the findings 2xSET may provide greater or comparable live birth rates with lower multiple birth and morbidity than DET. Promotion of 2xSET where appropriate for maternal age and embryo quality should be implemented to enhance reproductive outcomes and reduce the risk of morbidity in IVF/ICSI pregnancies. Trial registration number Not Applicable

Pregnancy outcomes of monochorionic diamniotic and dichorionic diamniotic twin pregnancies conceived by assisted reproductive technology and conceived naturally: a study based on chorionic comparison

ObjectiveTo evaluate monochorionic diamniotic (MCDA) and dichorionic diamniotic (DCDA) twin pregnancies conceived by assisted reproductive technology (ART) and conceived naturally.MethodsWe retrospectively analyzed the data on twin pregnancies conceived by ART from January 2015 to January 2022,and compared pregnancy outcomes of MCDA and DCDA twins conceived by ART with those of MCDA and DCDA twins conceived naturally, pregnancy outcomes between MCDA and DCDA twins conceived by ART, and pregnancy outcomes of DCT and TCT pregnancies reduced to DCDA pregnancies with those of DCDA pregnancies conceived naturally.ResultMCDA pregnancies conceived by ART accounted for 4.21% of the total pregnancies conceived by ART and 43.81% of the total MCDA pregnancies. DCDA pregnancies conceived by ART accounted for 95.79% of the total pregnancies conceived by ART and 93.26% of the total DCDA pregnancies. Women with MCDA pregnancies conceived by ART had a higher premature delivery rate, lower neonatal weights, a higher placenta previa rate, and a lower twin survival rate than those with MCDA pregnancies conceived naturally (all p < 0.05). Women with DCDA pregnancies conceived naturally had lower rates of preterm birth, higher neonatal weights, and higher twin survival rates than women with DCDA pregnancies conceived by ART and those with DCT and TCT pregnancies reduced to DCDA pregnancies (all p < 0.05).ConclusionOur study confirms that the pregnancy outcomes of MCDA pregnancies conceived by ART are worse than those of MCDA pregnancies conceived naturally. Similarly, the pregnancy outcomes of naturally-conceived DCDA pregnancies are better than those of DCDA pregnancies conceived by ART and DCT and TCT pregnancies reduced to DCDA pregnancies.

Vaginal Progesterone to Prevent Spontaneous Preterm Birth in Women With a Sonographic Short Cervix: The Story of the PREGNANT Trial.

The PREGNANT trial was a randomized, placebo-controlled, multicenter trial designed to determine the efficacy and safety of vaginal progesterone (VP) to reduce the risk of birth < 33 weeks and of neonatal complications in women with a sonographic short cervix (10 to 20 mm) in the mid-trimester (19 to 23 6/7 wk). Patients allocated to receive VP had a 45% lower rate of preterm birth (8.9% vs 16.1%; relative risk = 0.55; 95% CI: 0.33-0.92). Neonates born to mothers allocated to VP had a 60% reduction in the rate of respiratory distress syndrome. This article reviews the background, design, execution, interpretation, and impact of the PREGNANT Trial.

Preterm Birth Risk and Maternal Nativity, Ethnicity, and Race

Immigrant birthing people have lower rates of preterm birth compared with their US-born counterparts. This advantage and associated racial and ethnic disparities across the gestational age spectrum have not been examined nationally. To examine associations of maternal nativity, ethnicity, and race with preterm birth. This cohort study used birth certificates from the National Vital Statistics System to analyze in-hospital liveborn singleton births in the US between January 1, 2009, and December 31, 2018. Data were analyzed from January to June 2023. Mutually exclusive nativity, ethnicity, and race subgroups were constructed using nativity (defined as US-born or non-US-born), ethnicity (defined as Hispanic or non-Hispanic), and race (defined as American Indian or Alaska Native, Asian, Black, Native Hawaiian or Other Pacific Islander, White, or other [individuals who selected other race or more than 1 race]). The primary outcome of interest was preterm birth. Modified Poisson and multinomial logistic regression models quantified relative risk (RR) of preterm birth overall (<37 weeks' gestation) and by gestational category (late preterm: 34-36 weeks' gestation; moderately preterm: 29-33 weeks' gestation; and extremely preterm: <29 weeks' gestation) for each maternal nativity, ethnicity, and race subgroup compared with the largest group, US-born non-Hispanic White (hereafter, White) birthing people. The RR of preterm birth overall and by category was also measured within each racial and ethnic group by nativity. Models were adjusted for maternal demographic and medical covariates, birth year, and birth state. A total of 34 468 901 singleton live births of birthing people were analyzed, with a mean (SD) age at delivery of 28 (6) years. All nativity, ethnicity, and race subgroups had an increased adjusted risk of preterm birth compared with US-born White birthing people except for non-US-born White (adjusted RR, 0.85; 95% CI, 0.84-0.86) and Hispanic (adjusted RR, 0.98; 95% CI, 0.97-0.98) birthing people. All racially and ethnically minoritized groups had increased adjusted risks of extremely preterm birth compared with US-born White birthing people. Non-US-born individuals had a decreased risk of preterm birth within each subgroup except non-Hispanic Native Hawaiian or Other Pacific Islander individuals, in which immigrants had significantly increased risk of overall (adjusted RR, 1.07; 95% CI, 1.01-1.14), moderately (adjusted RR, 1.10; 95% CI, 0.92-1.30), and late (adjusted RR, 1.11; 95% CI, 1.02-1.22) preterm birth than their US-born counterparts. Results of this cohort study suggest heterogeneity of preterm birth across maternal nativity, ethnicity, and race and gestational age categories. Understanding these patterns could aid the design of targeted preterm birth interventions and policies, especially for birthing people typically underrepresented in research.

Pregnancy Outcomes among Pregnant Persons after COVID-19 Vaccination: Assessing Vaccine Safety in Retrospective Cohort Analysis of U.S. National COVID Cohort Collaborative (N3C).

COVID-19 vaccines have been shown to be effective in preventing severe illness, including among pregnant persons. The vaccines appear to be safe in pregnancy, supporting a continuously favorable overall risk/benefit profile, though supportive data for the U.S. over different periods of variant predominance are lacking. We sought to analyze the association of adverse pregnancy outcomes with COVID-19 vaccinations in the pre-Delta, Delta, and Omicron SARS-CoV-2 variants' dominant periods (constituting 50% or more of each pregnancy) for pregnant persons in a large, nationally sampled electronic health record repository in the U.S. Our overall analysis included 311,057 pregnant persons from December 2020 to October 2023 at a time when there were approximately 3.6 million births per year. We compared rates of preterm births and stillbirths among pregnant persons who were vaccinated before or during pregnancy to persons vaccinated after pregnancy or those who were not vaccinated. We performed a multivariable Poisson regression with generalized estimated equations to address data site heterogeneity for preterm births and unadjusted exact models for stillbirths, stratified by the dominant variant period. We found lower rates of preterm birth in the majority of modeled periods (adjusted incidence rate ratio [aIRR] range: 0.42 to 0.85; p-value range: <0.001 to 0.06) and lower rates of stillbirth (IRR range: 0.53 to 1.82; p-value range: <0.001 to 0.976) in most periods among those who were vaccinated before or during pregnancy compared to those who were vaccinated after pregnancy or not vaccinated. We largely found no adverse associations between COVID-19 vaccination and preterm birth or stillbirth; these findings reinforce the safety of COVID-19 vaccination during pregnancy and bolster confidence for pregnant persons, providers, and policymakers in the importance of COVID-19 vaccination for this group despite the end of the public health emergency.

Efficacy of Vaginal Progesterone for Maintenance Therapy after Arrested Preterm Labor: A Randomized Controlled Trial

Objective: To evaluate whether 400 milligrams of vaginal progesterone, as a maintenance tocolysis, could prolong the latency to delivery, prevent preterm birth, reduce adverse neonatal outcomes, and delay cervix shortening after arrested preterm labor. Materials and Methods: An open-label randomized controlled trial was conducted on 80 singleton pregnant women with symptomatic preterm labor, who were successfully arrested with Nifedipine as acute tocolysis, at gestational ages 24 to 33 weeks and 6 days, at Hatyai Hospital. Participants were then randomly allocated using a permuted block of four to either the vaginal progesterone group or the control group. Results: The vaginal progesterone group resulted in a longer mean latency to delivery at 47.3±17.1 versus 34.2±18.1 days (p&lt;0.001), a lower preterm birth rate at 12.5% versus 35.0% (p=0.036), a higher gestational age at delivery of 38.5±1.3 versus 36.7±2.5 weeks (p&lt;0.001), and improved birth weight of 2,932.6±309.9 versus 2,627.1±517.3 grams (p=0.002). There were no significant differences in the delay of cervical shortening at –3.2±2.8 versus –4.7±5.0 mm (p=0.192) or the rate of neonatal intensive care unit (NICU) admission of 4% versus 11% (p=0.086) or the rate of birth asphyxia of 5% versus 10% (p=0.675). Conclusion: Administering 400 milligrams of vaginal progesterone as a maintenance tocolysis in arrested preterm labor effectively prolongs latency to delivery, reduces the rate of preterm birth, and improves birth weight. However, it fails to delay cervical shortening and does not decrease the rate of NICU admission or occurrence of birth asphyxia. Keywords: Arrested preterm labor; Preterm birth; Vaginal progesterone; Maintenance therapy

Maternal and Neonatal Outcomes among Teenage Pregnancy between Pre and COVID-19 Pandemic: A Thailand Rural Hospital Case 2017-2022

Objective: To investigate the impact of the COVID-19 pandemic on teenage pregnancy, including the prevalence of preterm birth, maternal and neonatal outcomes, and associated complications. Materials and Methods: A comparative retrospective study was conducted at Nakhon Nayok General Hospital’s Department of Obstetrics and Gynecology in Thailand. The present study focused on teenage pregnancies delivered between January 2017 and December 2022. Subjects were divided into two groups, a control group, consisting of deliveries between 2017 and 2019, and a study group, encompassing deliveries between 2020 and 2022. Results: There were 566 cases in the study group and 644 cases in the control group, resulting in an overall teenage pregnancy prevalence of 13.9%, or 1,230 out of 8,811 deliveries. The mean age of participants was 17.4 years. Demographic characteristics between both groups were comparable. Preterm birth was observed in 11.8% of all teenage pregnancies, with a lower preterm birth rate in the study group compared to the control group at 9.5% versus 13.8%, respectively, and this difference was statistically significant. The rates of cesarean delivery, low birth weight (LBW), and stillbirth did not change significantly before and during the COVID-19 pandemic. At the postpartum, the study group displayed a preference for long-acting reversible contraception (LARC) methods, with 83% choosing LARC, compared to 75.6% in the control group (p=0.001). Conclusion: During the COVID-19 pandemic, the rate of preterm births among teenage pregnancies decreased. Additionally, there was an increase in the preference for LARC methods among teenage pregnancy cases. Keywords: Teenage pregnancy; COVID-19; Pregnancy outcome; Contraception

Reduction in spontaneous and iatrogenic preterm births in twin pregnancies during COVID-19 lockdown in Melbourne, Australia: a multicenter cohort study

BackgroundMelbourne, Australia, recorded one of the longest and most stringent pandemic lockdowns in 2020, which was associated with an increase in preterm stillbirths among singleton pregnancies. Twin pregnancies may be particularly susceptible to the impacts of pandemic disruptions to maternity care due to their higher background risk of adverse perinatal outcomes.MethodsMulticenter retrospective cohort study of all twin pregnancies birthing in public maternity hospitals in Melbourne. Multivariable log-binomial regression models were used to compare perinatal outcomes between a pre-pandemic group to women in whom weeks 20+0 to 40+0 of gestation occurred entirely during one of two lockdown-exposure periods: exposure 1 from 22 March 2020 to 21 March 2021 and exposure 2 from 22 March 2021 to 27 March 2022.ResultsTotal preterm births < 37 weeks were significantly lower in exposure 1 compared with the pre-pandemic period (63.1% vs 68.3%; adjusted risk ratio 0.92 95% CI 0.87–0.98, p = 0.01). This was mainly driven by fewer spontaneous preterm births (18.9% vs 20.3%; adjusted risk ratio 0.95 95% CI 0.90–0.99, p = 0.04). There were also lower rates of preterm birth < 34 weeks (19.9% vs 23.0%, adjusted risk ratio 0.93 95% CI 0.89–0.98 p = 0.01) and total iatrogenic births for fetal compromise (13.4% vs 20.4%; adjusted risk ratio 0.94 95% CI 0.89–0.98, p = 0.01). There were fewer special care nursery admissions (38.5% vs 43.4%; adjusted risk ratio 0.91 95% CI 0.87–0.95, p < 0.001) but no significant changes in stillbirth (1.5% vs 1.6%; adjusted risk ratio 1.00 95% CI 0.99–1.01, p = 0.82). Compared with the pre-pandemic period, there were more preterm births < 28 weeks and neonatal intensive care unit admissions in exposure 2.ConclusionsMelbourne’s first lockdown-exposure period was associated with lower preterm births in twins without significant differences in adverse newborn outcomes. Our findings provide insights into the influences on preterm birth and the optimal timing of delivery for twins.

Comparing outcomes of fetal growth restriction defined by estimated fetal weight versus isolated abdominal circumference.

The objective of this study was to compare maternal and neonatal outcomes when the diagnosis of FGR was based on isolated abdominal circumference < 10th percentile for gestational age (GA) (iAC group) versus overall estimated fetal weight < 10th percentile (EFW group). This was a retrospective cohort study of singleton gestations who underwent growth ultrasounds and delivered at a single health system from 1/1/19-9/4/20. The study group was comprised of patients with AC < 10th percentile and EFW ≥ than the 10th percentile (iAC group). The control group included patients with overall EFW < 10th percentile (EFW group). Outcomes evaluated included GA at delivery, mode of delivery, fetal and neonatal outcomes. Data was analyzed using Mann Whitney U, X2, and Fisher exact tests with significance defined as p < 0.05. 635 women met the inclusion criteria, 259 women in the iAC group and 376 women in the EFW group. The iAC group was noted to have a later GA at diagnosis and delivery. iAC was associated with lower rates of preterm birth (PTB), NICU admission, SGA at delivery and umbilical artery cord gas < 7.0. Using iAC as a definition of FGR increased the number of FGR cases by 1.69-fold over EFW criteria alone. However, obstetrical and neonatal outcomes for the iAC group appear to be significantly better than those in the EFW group, with low rates of PTB, NICU admission, and umbilical artery cord gas < 7.0.

The paradoxical influence of the COVID-19 lockdown period on different types of preterm births in Alberta: a provincial study.

The objective of this study was to determine if the COVID-19 pandemic impacted different types of preterm birth rates in Alberta, Canada. A population-based, retrospective, cohort study was conducted from March 15, 2015 to December 31, 2020 using provincial data. The primary exposure was the COVID-19 lockdown period, and the primary outcome was the incidence of preterm birth (<37 weeks gestational age). Multivariable analyses in the complete lockdown and overall lockdown (partial and complete lockdown) periods were performed to test the association between the year of birth and preterm birth status and were adjusted for various independent variables. Preterm birth status was adjusted for various confounding factors. Following the analysis of n = 41,187 mothers and their singleton infants, we found that the lockdown due to COVID-19 had no impact in reducing the overall preterm birth rate. However, a paradoxical influence was observed with an increase of extremely low preterm births in the overall lockdown period, and a decrease in moderate preterm births during the complete lockdown period. The results of this study demonstrated that there was a decrease in moderate and increase in extremely low preterm birth rates as a result of the COVID-19 lockdown. However, the COVID-19 lockdown did not impact the very preterm and late preterm birth rate in Alberta.

Activity restriction for women with arrested preterm labor: a randomized controlled trial

In the past, some pregnant women have been recommended to be in activity restriction because of the presumed increased risk of preterm birth due to the increased release of catecholamines, which might stimulate myometrial activity, during exercise and aerobic activity. This study aimed to test the hypothesis that in women with singleton pregnancy and arrested preterm labor, activity restriction would reduce the rate of preterm birth at <37 weeks of gestation. This was a parallel-group nonblinded randomized trial conducted at a single center in Italy. Eligible patients were those with a diagnosis of arrested preterm labor, defined as not delivering after 48 hours of hospitalization for threatened preterm labor, with transvaginal ultrasound cervical length ≤25 mm, no other symptoms of possible uterine contractions, and cervical dilatation <3 cm at pelvic examination. Inclusion criteria were singleton pregnancies between 24 0/7 and 33 6/7 weeks of gestation. Participants were randomized in a 1:1 ratio to either activity restriction at the time of discharge or no activity restriction. Women in the intervention group were recommended activity restriction, defined as the following: pelvic rest, prohibition of sexual activity, and reduction of work and/or nonwork activity. The primary endpoint was preterm birth at <37 weeks of gestation. A total of 120 participants were included in the trial; 60 patients were enrolled in the activity restriction group and 60 in the control group. Preterm birth at <37 weeks of gestation occurred in 15 of 60 women (25.0%) in the activity restriction group and 23 of 60 women (38.3%) in the control group (relative risk, 0.65; 95% confidence interval, 0.38-1.12). There was no significant between-group difference in the incidence of preterm birth at <32 weeks and in neonatal outcomes, but the trial was not powered for these outcomes. In singleton gestations with arrested preterm labor, activity restriction, including pelvic rest, prohibition of sexual activity, and reduction of work and/or nonwork activity, does not result in a lower rate of preterm birth at <37 weeks. Given the evidence on the lack of benefits, use of activity restriction in this population should be discouraged.

Omega-3 Fatty Acids during Pregnancy in Indigenous Australian Women of the Gomeroi Gaaynggal Cohort.

Higher dietary intakes of Omega-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFAs) have been linked to lower rates of preterm birth and preeclampsia. The aim of this analysis was to describe dietary intake and fractions of red blood cell (RBC) membrane LC-PUFAs during pregnancy in a cohort of Indigenous Australian women. Maternal dietary intake was assessed using two validated dietary assessment tools and quantified using the AUSNUT (Australian Food and Nutrient) 2011-2013 database. Analysis from a 3-month food frequency questionnaire indicated that 83% of this cohort met national n-3 LC-PUFA recommendations, with 59% meeting alpha-linolenic acid (ALA) recommendations. No nutritional supplements used by the women contained n-3 LC-PUFAs. Over 90% of women had no detectable level of ALA in their RBC membranes, and the median Omega-3 Index was 5.5%. This analysis appears to illustrate a decline in concentrations of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) across gestation in women who had preterm birth. However, there was no visible trend in LC-PUFA fractions in women who experienced hypertension during pregnancy. Further research is needed to better understand the link between dietary intake of n-3 LC-PUFA-rich foods and the role of fatty acids in preterm birth and preeclampsia.

Analysis of Pregnancy Outcomes After Fetal Reduction in Monochorionic, Dichorionic, and Trichorionic Triplet Pregnancies

To compare the pregnancy outcomes of pregnancy outcomes after selective fetal reduction treatment in monochorionic, dichorionic, and trichorionic triplet pregnancies. We conducted a retrospective analysis of the clinical data of 118 pregnant women carrying triplets. All subjects underwent regular prenatal check-ups and were admitted for delivery at West China Second University Hospital, Sichuan University between January 1, 2012 and January 31, 2021. According to the chorionicity, the subjects were divided into a monochorionic group ( n=13), a dichorionic group ( n=44), and a trichorionic group ( n=61). Within each group, the subjects were further divided into two subgroups, a reduction group and an expectant treatment group, according to whether they underwent fetal reduction or not. The clinical data and pregnancy outcomes were compared between the subgroups within each group. In the monichorionic group, the reduction subgroup had a lower preterm birth rate and higher neonatal birth body mass than those of the expectant management subgroup, but the differences were not statistically significant. In the dichorionic and trichorionic groups, the rates of preterm delivery, neonatal hospitalization, and serious complications of the reduction subgroups were lower than those of the expectant subgroups ( P<0.05), while the neonatal birth body mass was higher in the reduction subgroups than that in the expectant subgroups ( P<0.05). In the dichorionic group, the incidence of intrahepatic cholestasis during pregnancy was lower in the reduction subgroup than that in the expectant treatment subgroup. In all 3 groups, there was no statistically significant difference between the subgroups in the incidence of gestational diabetes, hypertensive disorders of pregnancy, premature rupture of membranes, and postpartum hemorrhage. The survival curve analysis showed that women receiving fetal reduction during the first trimester had a lower risk of pregnancy loss and more significant prolonged of gestational age than those undergoing the procedure during the second trimester. Fetal reduction of triplets can significantly prolong the gestational age and improve the perinatal prognosis. In addition, selective reduction in the first trimester may lead to greater benefits than selective reduction in the second trimester does.

The association between maternal stature and adverse birth outcomes and the modifying effect of race and ethnicity: a population-based retrospective cohort study

There are known differences in the risk of perinatal and maternal birth outcomes because of maternal factors, such as body mass index and maternal race. However, the association of maternal height with adverse birth outcomes and the potential differences in this relationship by race and ethnicity have been understudied. This study aimed to examine the association between maternal stature and adverse perinatal outcomes and the potential modification of the association by race and ethnicity. This retrospective cohort study was conducted using data on all singleton births in the United States in 2016 and 2017 (N=7,361,713) obtained from the National Center for Health Statistics. Short and tall stature were defined as <10th and >90th percentiles of the maternal height distribution (<154.9 and >172.7 cm, respectively). Race and ethnicity categories included non-Hispanic White, non-Hispanic Black, American Indian or Alaskan Native Asian or Pacific Islander, and Hispanic. The primary outcomes were preterm birth (<37 weeks of gestation), perinatal death, and composite perinatal death or severe neonatal morbidity. Logistic regression was used to obtain adjusted odds ratios and 95% confidence intervals with adjustment for confounding by maternal age, body mass index, and other factors. Multiplicative and additive effect modifications by race and ethnicity were assessed. The study population included 7,361,713 women with a singleton stillbirth or live birth. Short women had an increased risk of adverse outcomes, whereas tall women had a decreased risk relative to average-stature women. Short women had an increased risk of perinatal death and composite perinatal death or severe neonatal morbidity (adjusted odds ratios, 1.14 [95% confidence interval, 1.10-1.17] and 1.21 [95% confidence interval, 1.19-1.23], respectively). The association between short stature and perinatal death was attenuated in non-Hispanic Black women compared with non-Hispanic White women (adjusted odds ratio, 1.10 [95% confidence interval, 1.03-1.17] vs 1.26 [95% confidence interval, 1.19-1.33]). Compared with average-stature women, tall non-Hispanic White women had lower rates of preterm birth, perinatal death, and composite perinatal death or severe neonatal morbidity (adjusted odds ratios, 0.82 [95% confidence interval, 0.81-0.83], 0.95 [95% confidence interval, 0.91-1.00], and 0.90 [95% confidence interval, 0.88-0.93], respectively). The association between tall and average stature with perinatal death was reversed in Hispanic women (adjusted odds ratio, 1.27; 95% confidence interval, 1.12-1.44). Compared with average-stature women, all tall women had lower rates of preterm birth, particularly among non-Hispanic Black and Hispanic women. Relative to average-stature women, short women have an increased risk of adverse perinatal outcomes across all race and ethnicity groups; these associations were attenuated in Hispanic women and for some adverse outcomes in non-Hispanic Black and Asian women. Tall mothers have a lower risk of preterm birth in all racial and ethnic groups, whereas tall non-Hispanic White mothers have a lower risk of perinatal death or severe neonatal morbidity compared with average-stature women.

Fewer Preterm Births in the First COVID-19 Pandemic Year? An Evaluation of the Berlin Perinatal Data for the Years 2017 to 2020.

Introduction The study analyzes and interprets possible effects of the COVID-19 pandemic on the preterm birth rate. Research questions included: were there fewer preterm births in Berlin in 2020, the first year of the pandemic, compared to the three years before the pandemic? Were there differences in preterm birth rates grouped according to weeks of gestation? Method The perinatal data of all singleton pregnancies were evaluated with regard to birth rates in Berlin, and the numbers of preterm neonates born in the three pre-pandemic years from 2017 to 2019 were compared to the rate for 2020, the first year of the pandemic. Results The overall number of singleton pregnancies born in maternity hospitals and labor wards in Berlin decreased in the first year of the pandemic. The percentage of preterm neonates born before 37+0 weeks of gestation (GW) was significantly lower in 2020 compared to the three previous years, with significantly more preterm neonates born before 28+0 GW and significantly fewer preterm neonates born between 28+0 to 35+0 GW. In 2020, significantly fewer neonates born before 37+0 weeks of gestation were delivered by primary caesarean section. The incidence of induced births was approximately the same. Conclusions In the first year of the pandemic, a range of social, iatrogenic, and biological factors may have had an impact on preterm birth rates. A Germany-wide evaluation of perinatal data across different German federal states for the period 2020 to 2022 would offer the opportunity to identify the causes of this lower rate of preterm births and determine whether conclusions can be drawn from this which would affect future strategies to reduce preterm birth rates.

S719 Maternal and Neonatal Outcomes in Vedolizumab and Ustekinumab Exposed Pregnancies: Results From the PIANO Registry

Introduction: Pregnancy outcomes in IBD patients with quiescent disease are similar to the general population. Data from the Pregnancy Inflammatory bowel disease And Neonatal Outcomes (PIANO) registry have demonstrated the safety of anti-tumor necrosis factor alpha (TNFs) and thiopurines in pregnancy. The objective of this study is to provide updated information from the PIANO registry on maternal and fetal outcomes in patients exposed to ustekinumab (UST) and vedolizumab (VDZ). Methods: In this multicenter prospective observational study, we included pregnant women with singleton pregnancies and a diagnosis of inflammatory bowel disease. Questionnaires were administered to women at study intake, each subsequent trimester, delivery, and at 4, 9, and 12 months after birth. Bivariate analyses were utilized to determine the independent effects of specific drug classes on outcomes. The exposure cohorts were VDZ, UST, TNFs, immunomodulators, and combination with biologics and immunomodulators. All were compared to no exposure to biologics/immunomodulators. Results: There were 1642 completed pregnancies with 1581 live births. Maternal mean age was 32.1±4.6 years at delivery with 62 VDZ and 43 UST exposed. Women on UST were more likely to have Crohn’s disease. There was no increased risk of spontaneous abortion, small for gestational age, low birth weight, neonatal intensive care unit stay, congenital malformations, or intrauterine growth restriction with in utero VDZ or UST exposure (Table). The rate of preterm birth was 0% in UST, 12.7% VDZ, 8.2% TNFs, and 9.7% in the unexposed cohort (p = 0.037). Rates of serious and non-serious infections at birth and within the first 12 months of life were comparable among all groups, with an increase in nonserious infections in VDZ group at 4 months, which did not persist at 1 year. There was no increased risk of placental complications in the VDZ cohort compared to the unexposed cohort. UST infant concentrations at birth were increased whereas VDZ concentrations were overall decreased compared to maternal serum drug concentrations. Conclusion: An updated analysis of UST and VDZ exposure during pregnancy suggests no increase in complications compared to TNFs, immunomodulators and combination of biologics with immunomodulators. UST was associated with lower rates of preterm birth and Cesarean section. No signal was found for increased placental events with either therapy. Continuation of UST and VDZ during pregnancy is recommended. Table 1. - Pregnancy Related Complications by Drug Exposure in completed pregnancies Pregnancy Events(% yes) No exposure(n = 430) Anti-TNFs(n = 700) Immuno-modulators(n = 226) Combination: Biologics + Immunomodulators(n = 179) UST(n = 43) VDZ(n = 62) p-value Any pregnancy complication 86/401(21.4%) 123/649(19.0%) 42/208(20.2%) 28/169(16.6%) 10/39(25.6%) 10/59(16.9%) 0.663 SAB (gestation ages ≤140 days) 9/234(3.8%) 18/438(4.1%) 6/136(4.4%) 2/109(1.8%) 2/21(9.5%) 1/30(3.3%) 0.675 SAB (all gestation ages) 11/429(2.6%) 18/697(2.6%) 7/226(3.1%) 2/178(1.1%) 2/43(4.7%) 1/62(1.6%) 0.739 Preterm birth (< 37 weeks) 38/391(9.7%) 53/643(8.2%) 25/204(12.3%) 24/166(14.5%) 0/38(0.0%) 7/55(12.7%) 0.037 Small for gestational age 16/383(4.2%) 31/579(5.4%) 5/202(2.5%) 3/147(2.0%) 1/14(7.1%) 2/35(5.7%) 0.356 LBW (< 2500 g) 21/380(5.5%) 38/635(6.0%) 9/206(4.4%) 8/159(5.0%) 1/38(2.6%) 6/55(10.9%) 0.493 Intrauterine growth restriction 11/429(2.6%) 13/700(1.9%) 1/226(0.4%) 4/179(2.2%) 0/43(0.0%) 1/62(1.6%) 0.455 Cesarean section 154/394(39.1%) 292/650(44.9%) 93/208(44.7%) 90/168(53.6%) 12/38(31.6%) 26/55(47.3%) 0.024 NICU at birth 58/397(14.6%) 107/651(16.4%) 31/209(14.8%) 29/168(17.3%) 4/37(10.8%) 8/55(14.5%) 0.879 Congenital malformations 28/268(10.4%) 61/581(10.5%) 19/150(12.7%) 18/153(11.8%) 7/39(17.9%) 8/59(13.6%) 0.715 Any of the above 275/430(64.0%) 477/700(68.1%) 156/226(69.0%) 128/179(71.5%) 28/43(65.1%) 42/62(67.7%) 0.513 Abruptio Placenta 3/198(1.5%) 5/302(1.7%) 1/93(1.1%) 1/75(1.3%) 0/13(0.0%) 0/31(0.0%) >0.999 Pre-Eclampsia/Eclampsia 18/198(9.1%) 30/302(9.9%) 13/93(14.0%) 7/75(9.3%) 2/13(15.4%) 4/31(12.9%) 0.512 Placenta previa 5/197(2.5%) 9/302(3.0%) 2/93(2.2%) 1/75(1.3%) 0/13(0.0%) 2/31(6.5%) 0.243 Hemorrhage 5/197(2.5%) 5/302(1.7%) 5/93(5.4%) 2/75(2.7%) 3/13(23.1%) 0/31(0.0%) >0.999 Postpartum hemorrhage 6/197(3.1%) 15/302(2.1%) 1/93(1.1%) 5/75(6.7%) 0/13(0.0%) 1/31(3.2%) >0.999 TNF: tumor necrosis factor, UST: ustekinumab, VDZ: vedolizumab, SAB: spontaneous abortion, LBW: low birth weight, g: grams, NICU: neonatal intensive care unit, vs: versus.

The association of doula support and patient experiences with hospital staff during birth in a sample of California women: An exploratory analysis.

Research suggests that doula support improves birth outcomes, contributing to lower rates of preterm birth, low birthweight, and nonindicated cesarean delivery. Few studies investigate whether doula support is associated with the quality of patient-reported birth experiences in hospital settings. This study uses data from Listening to Mothers in California, a statewide representative survey of women who gave birth in 2016 in Californian hospitals. The analytic sample included 1345 English-speaking participants. We used multivariable logistic regression to test for associations between doula support and self-reported unfair treatment, abuse, and rapport with delivery staff. We also examined associations between these experiences and openness to doula support in a future birth. Models adjusted for maternal sociodemographic characteristics and views about medical intervention in birth. Just over 9% of women had doula support during birth. During their hospital stay, 6.3% reported unfair treatment, 11.5% reported abuse by providers, and 5.7% reported no rapport with delivery room staff. There were no statistically significant relationships between doula support and unfair treatment, abuse, or delivery staff rapport in our models. Participants who reported no rapport with hospital staff were more likely to express openness to doula support in a future birth (AOR: 2.59; 95% CI: 1.15, 5.79). Despite their best efforts, doulas may not be able to mitigate all negative interactions between their clients and hospital staff. These experiences may also influence desires for additional support from doulas in future births. Hospital policies and practices should include doulas as valuable members of the care team to help ensure positive experiences during birth.

Group vs traditional prenatal care for improving racial equity in preterm birth and low birthweight: the Centering and Racial Disparities randomized clinical trial study

The United States has persistently high rates of preterm birth and low birthweight and is characterized by significant racial disparities in these rates. Innovative group prenatal care models, such as CenteringPregnancy, have been proposed as a potential approach to improve the rates of preterm birth and low birthweight and to reduce disparities in these pregnancy outcomes. This study aimed to test whether participation in group prenatal care would reduce the rates of preterm birth and low birthweight compared with individual prenatal care and whether group prenatal care would reduce the racial disparity in these rates between Black and White patients. This was a randomized controlled trial among medically low-risk pregnant patients at a single study site. Eligible patients were stratified by self-identified race and ethnicity and randomly allocated 1:1 between group and individual prenatal care. The primary outcomes were preterm birth at <37 weeks of gestation and low birthweight of <2500 g. The primary analysis was performed according to the intent-to-treat principle. The secondary analyses were performed according to the as-treated principle using modified intent-to-treat and per-compliance approaches. The analysis of effect modification by race and ethnicity was planned. A total of 2350 participants were enrolled, with 1176 assigned to group prenatal care and 1174 assigned to individual prenatal care. The study population included 952 Black (40.5%), 502 Hispanic (21.4%), 863 White (36.8%), and 31 "other races or ethnicity" (1.3%) participants. Group prenatal care did not reduce the rate of preterm birth (10.4% vs 8.7%; odds ratio, 1.22; 95% confidence interval, 0.92-1.63; P=.17) or low birthweight (9.6% vs 8.9%; odds ratio, 1.08; 95% confidence interval, 0.80-1.45; P=.62) compared with individual prenatal care. In subgroup analysis, greater attendance in prenatal care was associated with lower rates of preterm birth and low birthweight. This effect was most noticeable for the rates of low birthweight for Black participants in group care: intent to treat (51/409 [12.5%]), modified intent to treat (36/313 [11.5%]), and per compliance (20/240 [8.3%]). Although the rates of low birthweight were significantly higher for Black participants than White participants seen in individual care (adjusted odds ratio, 2.00; 95% confidence interval, 1.14-3.50), the difference was not significant for Black participants in group care compared with their White counterparts (adjusted odds ratio, 1.58; 95% confidence interval, 0.74-3.34). There was no difference in the overall rates of preterm birth or low birthweight between group and individual prenatal care. With increased participation in group prenatal care, lower rates of preterm birth and low birthweight for Black participants were observed. The role of group care models in reducing racial disparities in these birth outcomes requires further study.

“They’re gonna be there to advocate for me so I’m not by myself”: A qualitative analysis of Black women’s motivations for seeking and experiences with community doula care

ProblemIn the United States, Black women are disproportionately impacted by inequities in maternal health. BackgroundCommunity doula support may improve birth outcomes and experiences, including lower rates of preterm birth and low birthweight and increases in positive birthing experiences. Few studies have explored client experiences with doula care, specifically community doula care. AimTo explore Black doula clients’ motivations for seeking and experiences with community doula care. MethodsData are from a mixed methods process evaluation of an organization providing free community doula services in San Francisco, California. We conducted two rounds of qualitative interviews with doula clients who identified as Black or Pacific Islander between August 2019 and March 2020. Interviews explored clients’ knowledge of, experiences with, and motivations for seeking doula care and their perceptions of the services they received. We utilized a Rapid Assessment Process to synthesize findings and thematic analysis. FindingsClients’ motivations for seeking doula care included general lack of support and knowledge of mistreatment experienced by Black women in hospital settings. Doulas provided support in the form of information about the perinatal period and clients’ rights, advocacy in hospital settings, and connection to resources beyond pregnancy and birth. Some clients described doulas as helping them stay focused and make decisions during difficult labor experiences and described positive birth experiences despite experiencing complications. ConclusionCommunity doulas play an instrumental role in the birth experiences of Black women and birthing people. Efforts should be made to expand access to this needed support via policy and hospital practices.