Low-risk Pregnancies Research Articles

1063 Prenatal Exome in low-risk pregnancies and apparently normal fetuses – the rate of abnormal findings

1063 Prenatal Exome in low-risk pregnancies and apparently normal fetuses – the rate of abnormal findings

Influence of diagnosis of gestational diabetes mellitus on fear of childbirth

IntroductionConsidering the relationship between Gestational Diabetes Mellitus and maternal and perinatal adverse outcomes, it's pertinent to investigate whether this diagnosis is a predictor of fear of childbirth. As there is little data about the fear of childbirth in Brazil, it´s necessary to understand better the population, and this way the authors can identify factors that influence this fear as well as propose public health policies to treat it. ObjectiveThe main goal was to compare the prevalence of fear of childbirth between the groups of low-risk pregnancy and gestational diabetes mellitus. Material and methodsIn this cohort study, the sample consisted of 319 patients divided into low-risk pregnancy group (n = 152) and gestational diabetes mellitus group (n = 167). Patients have undergone a semi-structured interview with epidemiological, obstetric, and anthropometric data and the main cause of fear of childbirth. In addition, the patients have marked an “X” on the scale into the Fear of Birth Scale to describe their fear. After delivery, data have been collected through electronic medical records. ResultsThe prevalence of fear of childbirth found was higher for the gestational diabetes mellitus group (46.05%) compared to the low-risk pregnancy group (34.73%) with a cutoff score ≥ 54. In the whole sample, the main cause of fear of childbirth (score ≥ 60) was the pain of labor and delivery (31.58%). ConclusionsThe prevalence of fear of childbirth in the present study was greater than 30%, highlighting the relevance of implementing this assessment during prenatal care.

826 Integrating maternal genotypes to improve birth weight prediction in low-risk pregnancies

826 Integrating maternal genotypes to improve birth weight prediction in low-risk pregnancies

Influence of maternal and perinatal complications on therapeutic hypothermia in newborns with low Apgar scores.

The aim of this study was to evaluate the impact of therapeutic hypothermia on maternal and perinatal outcomes in newborns with Apgar score<7 at the 5th min. A retrospective cohort study was carried out with 55 newborns who had an Apgar score<7 at the 5th min (35 without and 20 with therapeutic hypothermia) from low-risk pregnancies between 33 and 41 weeks gestation. The Apgar score was calculated through an objective assessment by a neonatologist in the delivery room. Therapeutic hypothermia was indicated by a neonatologist in the delivery room, according to the protocol established by the Brazilian Society of Pediatrics. The maternal and perinatal outcomes of both groups (without and with therapeutic hypothermia) were compared. A rate of Apgar score<7 at the 5th min was 1.02%. No statistical differences were observed between the two groups (without and with therapeutic hypothermia) regarding maternal/perinatal complications. The presence of maternal/perinatal complications did not increase the odds ratio of neonatal therapeutic hypothermia in newborns with Apgar score<7 at the 5th min. The rate of Apgar score<7 at the 5th min was low, and it was not associated with any maternal/perinatal complications. There was no significant difference in maternal/perinatal complications between newborns who received therapeutic hypothermia and those who did not.

Women's preferences for caesarean or vaginal birth with a perspective of future fertility: A discrete choice experiment.

To investigate pregnant women's preferences for risks of vaginal and caesarean birth, including possible impacts on future fertility. In this discrete choice experiment, low-risk nulliparous pregnant women recruited after 28 weeks of gestation evaluated eight choice sets, each between two different hypothetical births scenarios which intermixed the risks of planned caesarean or vaginal birth. Scenarios consisted of six attributes: pain, maternal health, neonatal health, risk of unplanned intervention, impact on fertility and risk of complications in the next pregnancy. All scenarios contained risks to neonatal health as neither vaginal nor caesarean birth guarantee an ideal outcome. Choice data were analysed using a conditional logistic regression model. Between June and September 2023, 211 participants, including 34 from pilot interviews, completed the questionnaire. Influential attributes were maternal health (conditional odds ratio [COR] 1.29, 95% CI 1.17 to 1.42, p<0.001) and risk of unplanned intervention (COR 1.37, 95% CI 1.24 to 1.51, p<0.001), favouring caesarean birth. Conversely, impact on fertility (COR 0.75, 95% CI 0.68 to 0.83, p<0.001) and complications in the next pregnancy favoured vaginal birth (COR 0.90, 95% CI 0.82 to 1.00, p = 0.045). Participants weighed the included morbidity risks of planned caesarean and vaginal birth in a low-risk pregnancy approximately equally. To facilitate an informed birth decision, clinicians should, apart from neonatal outcomes, particularly consider discussing impacts on fertility, maternal health and the risks of unplanned intervention or future pregnancy complications.

829 Cost-effectiveness of exome and genome sequencing for low-risk pregnancies

829 Cost-effectiveness of exome and genome sequencing for low-risk pregnancies

Comparison Of Maternal And Perinatal Outcome Of Isolated Borderline Amniotic Fluid Index Versus Normal Amniotic Fluid In Low-Risk Pregnancies At Term

Objective: The objective of the study was to compare the maternal and perinatal outcomes in low-risk pregnancies having borderline Amniotic fluid index with normal amniotic fluid index at term. Methods: This prospective observational study, included 540 low-risk pregnant women admitted at POF Hospital Wah Cantt between 1st June 2020-31st Dec 2022. Group A had 180 women with borderline AFI having normal umbilical artery Doppler and group B had 360 women with normal AFI between 37-40 weeks, who fulfilled the inclusion criteria. The data regarding baseline characteristics and fetomaternal outcome was collected on an already designed proforma and analysis was done by using SPSS version 23. Results: The difference in overall cesarean section rate (p=0.071) and cesarean section for fetal distress (p=0.076) was not statistically significant between the two groups. The borderline AFI did not increase the risk of meconium-stained liquor (p=0.116), 5minute APGAR score &lt;7 (p=0.218), admission to NICU (p=0.064) and low birth weight (mean birth weights p=0.278) compared to normal AFI. Conclusion: Borderline oligohydramnios does not increase the risk of cesarean section and cesarean section for fetal distress. There is no increase in the risk of meconium-stained liquor, 5-minute APGAR score&lt;7, admission to NICU and low birth weight. Keywords: Amniotic fluid index, borderline oligohydramnios, cesarean section, fetal distress, meconium-stained liquor.

Residual risk of clinically significant copy number variations in fetuses with nasal bone absence or hypoplasia after excluding non-invasive prenatal screening-detectable findings

BackgroundIt remains controversial whether prenatal screening or diagnostic testing should be offered to fetuses with nasal bone (NB) absence or hypoplasia, and there are no studies comparing the yield of chromosomal microarray analysis (CMA) to non-invasive prenatal screening (NIPS). The aim of this study was to evaluate the residual risk of clinically significant copy number variations (CNVs) in fetuses with NB absence or hypoplasia after excluding theoretically NIPS-detectable abnormalities, and to assess their clinical outcomes. MethodsThis prospective study encompassed 400 fetuses with NB absence or hypoplasia undergoing CMA testing between 2015 and 2022. Clinically significant CMA findings were categorized into three subgroups, including three-NIPS-detectable (trisomies 21, 18 and 13), five-NIPS-detectable (trisomies 21, 18 and 13 and sex chromosome aneuploidies) and genome-wide NIPS-detectable (variants over 7 Mb). We calculated the theoretical residual risk and compared it with the results of a control cohort of low-risk pregnancies. We further evaluated their clinical outcomes. ResultsThe overall diagnostic yield in our cohort was 7.8% (31/400). The detection rate of clinically significant CMA findings in fetuses with non-isolated NB absence or hypoplasia was significantly higher than that in fetuses with isolated NB absence or hypoplasia (20.0% vs. 6.6%, P =.005). The theoretical residual risks in all NIPS models were significantly higher when compared with the control cohort. The normal infant rate in fetuses with normal CMA results was 97.9% (323/330), and a significant higher incidence was observed in fetuses with isolated NB absence or hypoplasia compared with non-isolated NB absence or hypoplasia (98.4% vs. 91.7%, P =.028). ConclusionsThe residual risk of clinically significant CNVs in fetuses with NB absence or hypoplasia following the exclusion of theoretically NIPS-detectable findings was higher than that in low-risk pregnancies. This risk should be considered in genetic counseling to make a more comprehensive and precise choice regarding prenatal genetic testing.

Maternal and Perinatal Outcome After Induction of Labor Versus Expectant Management in Low-risk Pregnancies Beyond Term.

Due to still controversial discussion regarding appropriate termination of low-risk singleton pregnancies beyond term, this retrospective study aimed to evaluate maternal and perinatal outcomes depending on gestational age and obstetric management. This is a retrospective cohort analysis including 3.242 low-risk singleton deliveries at the Department of Obstetrics of the University Hospital of Cologne between 2017 and 2022. According to current national guidelines, the cohort was subdivided into three gestational groups, group 1: 40+0-40+6 weeks, group 2: 40+7-40+10 weeks and group 3>40+10 weeks. In our cohort, advanced gestational age was associated with higher rates of secondary caesarean sections, lower rates of spontaneous vaginal deliveries, higher rates of meconium-stained amniotic fluid and depressed neonates with APGAR < 7 after 5 min. Analyzing obstetric management, induction of labor significantly increased the rate of secondary sections and reduced the rate of spontaneous deliveries, while the percentage of assistant vaginal deliveries was independent from obstetric management and gestational age. Induction of labor also significantly enhanced the need for tocolytic subpartu and epidural anesthesia and caused higher rates of abnormalities in cardiotocography (CTG), which also resulted in more frequent fetal scalp blood testing; however, the rate of fetal acidosis was independent of both obstetric management and gestational age. Our study supports expectant management of low-risk pregnancies beyond term, as induction of labor increased the rate of secondary sections and did not improve perinatal outcome.

Twenty-four-hour urinary protein excretion in uncomplicated singleton pregnancy

Twenty-four-hour urinary total protein excretion is an essential parameter used for evaluation of renal function and early detection of gestational complications. However, data on reference ranges of 24-hour urinary total protein excretion in normal pregnancy are scarce. This study aimed to determine reference ranges for 24-hour urinary total protein excretion in a population with uncomplicated singleton pregnancies using a standard method for urinary total protein. In addition, the values of 24-hour urinary total protein were stratified by maternal age and prepregnancy body mass index. This study was based on a prospective cohort study in Shenzhen, China. The pregnant women were enrolled at their first prenatal clinical visit. All the participants were instructed to collect 24-hour urine samples during the following successive gestational periods: 6+0 to 13+6, 14+0 to 27+6, and 28+0 to 41+6 weeks. Total urinary protein excretion was analyzed by a colorimetric method. Ultimately, the study encompassed a total of 4844 pregnant women with uncomplicated pregnancies. The nonparametric percentile method was used to determine reference ranges for 24-hour urinary total protein excretion during different trimesters in women with uncomplicated pregnancies (excluding those with previous kidney disorders, gestational or chronic hypertension, preeclampsia, and pregestational diabetes mellitus, among others). The 24-hour urinary total protein levels expressed as medians and percentiles (5th, 95th) for each trimester were as follows: 72.0 (28.4, 165.0), 88.0 (34.0, 185.0), and 108.0 (37.5, 258.0) mg in the first, second, and third trimesters, respectively. A significant increase in 24-hour urinary total protein excretion was observed throughout pregnancy (all P values <.001). Moreover, 24-hour urinary total protein levels were higher in the older (≥35 years) than in the younger (<35 years) group from mid-gestation. Specifically, the median (interquartile range) 24-hour urinary total protein levels by age were 72.2 (50.6-100.0) vs 70.5 (50.5-100.0) mg, 85.8 (62.0-117.0) vs 96.0 (68.0-127.8) mg, and 106.6 (76.0-146.2) vs 114.7 (81.5-153.6) mg in the first, second, and third trimesters, respectively. In addition, 24-hour proteinuria was significantly increased in higher-weight (overweight or obese) subgroups compared with lower-weight (underweight or normal-weight) subgroups (all P values <.05). Our study provides reference values for 24-hour urinary total protein excretion with apparently uncomplicated pregnancies. Understanding these changes in low-risk pregnancies is essential for optimizing maternal management.

Screening for SARS-CoV-2 infection in women prepared for elective Cesarean Section: A tertiary hospital study

Background and objectives: The SARS-CoV-2 infection is a major concern as universal testing should be undertaken to pregnant women due to the high danger of transmission from a pregnant woman to her newborn. This study was conducted to report the rate of SARS-CoV-2 infection in women admitted to hospital for purpose of preparation for elective cesarean section and to find out their risk factors and any histories of the infection previously. Methods: A cross sectional study was conducted on 1000 on late third trimester pregnant women whom were prepared for elective cesarean section at department of Obstetrics and Gynecology, Erbil-Iraq from 1st Aug 2021 till 30th Jul 2022, History of previous SARS-CoV-2 infection and current signs and symptoms of the infection were recorded. All women underwent SARS-CoV-2 infection screening using nasal and throat swabs using polymerase chain reaction procedure. Results: Only (21.2%) of them were positive for the virus. There was a significant association between the current confirmed polymerase chain test with education, being a smoker, and all known signs and symptoms of the infection, such as fever, cough, and shortness of breath. When the clinical and social characteristics of women with low-risk and high-risk pregnancies were compared, there was a strong link between education, smoking, and loss of taste. Conclusion: Pregnant women may be advised to be tested for SARS-CoV-2 before cesarean section as almost one-quarter of participant were positive for the infection regardless of having sign and symptoms or not.

Sonographic demonstration of the sulci and gyri on the convex surface in normal fetuses using 3D-ICRV rendering technology.

To demonstrate morphological alteration of the sulci and gyri on the convex surface in normal fetuses using innovative three-dimensional inversion and Crystalvue and Realisticvue (3D-ICRV) rendering technology. 3D fetal brain volumes were collected from low-risk singleton pregnancies between 15+0 and 35+6 gestational weeks. Volumes were acquired from the transthalamic axial plane by transabdominal ultrasonography and were then post-processed with Crystalvue, Realisticvue rendering software and inversion mode. Volume quality was assessed. The anatomic definition of the sulci and gyri was determined according to location and orientation. The morphology alteration and sulcus display rates were recorded in sequential order of gestational weeks. Follow-up data were collected in all cases. 294 of 300 fetuses (294 brain volumes) (98%) with qualified fetal brain volumes were included (n=294, median 27 gestational weeks). 6 fetuses with unsatisfactory 3D-ICRV image quality were excluded. The morphology of the sulci and gyri on the brain convex surface could be demonstrated clearly on 3D-ICRV images. The Sylvian fissure was the first structure to be recognized. From 25 to 30 weeks, other sulci and gyri became visible. An ascending trend in the display rate of the sulci was found in this period. Follow-up showed no detectable anomalies. 3D-ICRV rendering technology is different from traditional 3D ultrasound. It can provide vivid and intuitive prenatal visualization of the sulci and gyri on the brain surface. Moreover, it may offer new ideas for neurodevelopment exploration.

Predictive value of fetal growth trajectory from 20 weeks of gestation onwards for severe adverse perinatal outcome in low-risk population: secondary analysis of IRIS study.

The placental dysfunction underlying fetal growth restriction (FGR) may result in severe adverse perinatal outcome (SAPO) related to fetal hypoxia. Traditionally, the diagnostic criteria for FGR have been based on fetal size, an approach that is inherently flawed because it often results in either over- or underdiagnosis. The anomaly ultrasound scan at 20 weeks' gestation may be an appropriate time at which to set a benchmark for growth potential of the individual fetus. We hypothesized that the fetal growth trajectory from that point onwards may be informative regarding third-trimester placental dysfunction. The aim of this study was to investigate the predictive value for SAPO of a slow fetal growth trajectory between 18 + 0 to 23 + 6 weeks and 32 + 0 to 36 + 6 weeks' gestation in a large, low-risk population. This was a post-hoc data analysis of the IUGR Risk Selection (IRIS) study, a Dutch nationwide cluster-randomized trial assessing the (cost-)effectiveness of routine third-trimester sonography in reducing SAPO. In the current analysis, for the first ultrasound examination we used ultrasound data from the routine anomaly scan at 18 + 0 to 23 + 6 weeks' gestation, and for the second we used data from an ultrasound examination performed between 32 + 0 and 36 + 6 weeks' gestation. Using multilevel logistic regression, we analyzed whether SAPO was predicted by a slow fetal growth trajectory, which was defined as a decline in abdominal circumference (AC) and/or estimated fetal weight (EFW) of more than 20 percentiles or more than 50 percentiles or as an AC growth velocity (ACGV) < 10th percentile (p10). In addition, we analyzed the combination of these indicators of slow fetal growth with small-for-gestational age (SGA) (AC or EFW < p10) and severe SGA (AC/EFW < 3rd percentile) at 32 + 0 to 36 + 6 weeks' gestation. Our sample included the data of 6296 low-risk singleton pregnancies, among which 82 (1.3%) newborns experienced at least one SAPO. Standalone declines in AC or EFW of > 20 or > 50 percentiles or ACGV < p10 were not associated with increased odds of SAPO. EFW < p10 between 32 + 0 and 36 + 6 weeks'gestation combined with a decline in EFW of > 20 percentiles was associated with an increased rate of SAPO. The combination of AC or EFW < p10 between 32 + 0 and 36 + 6 weeks' gestation with ACGV < p10 was also associated with increased odds of SAPO. The odds ratios of these associations were higher if the neonate was SGA at birth. In a low-risk population, a slow fetal growth trajectory as a standalone criterion does not distinguish adequately between fetuses with FGR and those that are constitutionally small. This absence of association may be a result of diagnostic inaccuracies and/or post-diagnostic (e.g. intervention and selection) biases. We conclude that new approaches to detect placental insufficiency should integrate information from diagnostic tools such as maternal serum biomarkers and Doppler ultrasound measurements. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.

Incidence of Respiratory Syncytial Virus-Associated Lower Respiratory Tract Illness in Infants in Low- and Middle-Income Regions During the Coronavirus Disease 2019 Pandemic.

Incidence data of respiratory syncytial virus-associated lower respiratory tract illness (RSV-LRTI) are sparse in low- and middle-income countries (LMICs). We estimated RSV-LRTI incidence rates (IRs) in infants in LMICs using World Health Organization case definitions. This prospective cohort study, conducted in 10 LMICs from May 2019 to October 2021 (largely overlapping with the coronavirus disease 2019 [COVID-19] pandemic), followed infants born to women with low-risk pregnancies for 1 year from birth using active and passive surveillance to detect potential LRTIs, and quantitative reverse-transcription polymerase chain reaction on nasal swabs to detect RSV. Among 2094 infants, 32 (1.5%) experienced an RSV-LRTI (8 during their first 6 months of life, 24 thereafter). Seventeen (0.8%) infants had severe RSV-LRTI and 168 (8.0%) had all-cause LRTI. IRs (95% confidence intervals [CIs]) of first RSV-LRTI episode were 1.0 (.3-2.3), 0.8 (.3-1.5), and 1.6 (1.1-2.2) per 100 person-years for infants aged 0-2, 0-5, and 0-11 months, respectively. IRs (95% CIs) of the first all-cause LRTI episode were 10.7 (8.1-14.0), 11.7 (9.6-14.0), and 8.7 (7.5-10.2) per 100 person-years, respectively. IRs varied by country (RSV-LRTI: 0.0-8.3, all-cause LRTI: 0.0-49.6 per 100 person-years for 0- to 11-month-olds). RSV-LRTI IRs in infants in this study were relatively low, likely due to reduced viral circulation caused by COVID-19-related nonpharmaceutical interventions. NCT03614676.

Exploring home births in Catalonia (Spain): A cross-sectional study of women's experiences and influencing factors.

The study explores the experiences of women with low-risk pregnancies and no complications who planned a home birth. A cross-sectional study was conducted using an online questionnaire. The questionnaire included socio-demographic, obstetric and perinatal variables. Birth satisfaction was evaluated via the Spanish version of the childbirth experience questionnaire. The study group comprised home-birthing women in Catalonia, Spain. Data were collected from 1 January 2019 to 31 December 2021. Statistical analysis was performed using SPSS. A total of 236 women responded. They reported generally positive experiences, with professional support and involvement being the most highly rated dimensions. Better childbirth experiences were associated with labour lasting less than 12 h, no perineal injuries, no intrapartum transfers to hospital, euthocic delivery and the presence of a midwife. Women's positive home birth experiences were linked to active participation and midwife support. Multiparous women felt safer. Medical interventions, especially transfers to hospitals, reduced satisfaction, highlighting the need for improved care during home births. Home births should be included among the birthplace options offered by public health services, given the extremely positive feedback reported by women who gave birth at home. Home birth is not an option offered under Catalonia's public health system only as a private service. The experience of home-birthing women is unknown. This study shows a very positive birth experience due to greater participation and midwife support. The results help stakeholders assess home birth's public health inclusion and understand valued factors, supporting home-birthing women. The study followed the STROBE checklist guidelines for cross-sectional studies. Women who planned a home birth participated in the pilot test to validate the instrument, and their contributions were collected by the lead researcher. The questionnaire gathered the participants' email addresses, and a commitment was made to disseminate the study's results through this means.

Navigating portal hypertension: Unlocking safe passage to healthy pregnancy in EHPVO.

Pregnancy is associated with hyperdynamic circulatory state and increased risk of portal hypertension related complications in patients with extra-hepatic portal vein obstruction (EHPVO). We aim to study the impact of EHPVO on pregnancy-related outcomes with focus on subset of patients with UGIB (upper GI bleed). Retrospective analysis of obstetric, maternal and neonatal outcomes of patients with EHPVO registered between January 2006 and December 2022. Forty-five patients were included. Forty-five healthy females with low-risk pregnancies formed the control group. Adverse obstetric and neonatal outcomes were comparable between EHPVO and control group (22% vs. 28.6%; p > .05; low birth weight/ small for gestational age 17.8% vs. 36%, p = .0918 and 14.2% vs. 10%, p = .5698 respectively). Adverse outcomes were similar in patients with and without history of UGIB (26.3% vs. 19.4%, p = .0814; 17.8% vs. 36%, p = .0918; 14.2% vs. 10%, p = .5698). There was no maternal mortality in both the groups. A total of 7% pregnancies in EHPVO patients were complicated by ascites. EHPVO pregnancies have successful obstetric and neonatal outcomes with adequate management of portal hypertension.

Psychosocial adaptation, marital satisfaction and meaning in life between women with high and low-risk pregnancies

Psychosocial adaptation, marital satisfaction and meaning in life between women with high and low-risk pregnancies

The impact of maternity service restrictions related to COVID-19 on women's experiences of giving birth in England: A qualitative study

BackgroundThe COVID-19 pandemic led to significant changes in maternity service delivery in England, including: antenatal appointments being cancelled or held by phone; women having to attend antenatal scans alone; partners not being allowed to accompany women during labor; visitor restrictions on postnatal wards; and limited postnatal support. MethodsWe conducted semi-structured interviews with 46 women aged 18–45 who had low-risk pregnancies and gave birth to their babies using NHS services in England between 1st March 2020 and 1st March 2021. ResultsOur thematic analysis of interview data generated key themes: profound negative impacts of birth partners not being allowed to accompany women (including on emotional wellbeing, birth preferences and care-seeking choices); deep frustration about policy variation between trusts and inconsistent implementation of guidance; women being more concerned about the risk of giving birth alone than of COVID-19 infection; and women turning towards private care or delaying seeking NHS care so that they could have the birth experience they desired. The latter two results are, to the best of our knowledge, unique to this paper. ConclusionOur participants reported significant negative affects to their emotional and physical wellbeing because of maternity service restrictions. Going forward, efforts are required by policymakers and health service providers to re-establish trust in NHS maternity care and ensure capacity to provide for potential shifts in birthplace preferences. Health systems strengthening efforts should prioritise protecting the rights of women to access high quality, person-centred care in the event of future health emergencies that strain NHS capacity.

Women's experiences and views of outpatient and inpatient induction of labor with oral misoprostol: A secondary qualitative study.

As labor induction rates continue to increase, so has the interest in performing induction in an outpatient setting for pregnancies defined as low-risk. Twenty women participated in the pilot study of a Randomized Controlled Trial (RCT) comparing inpatient and outpatient labor induction with oral misoprostol. This study aimed to explore women's experiences of outpatient induction of labor and their views on this as an alternative method to inpatient labor induction. Semi-structured interviews were conducted, from November 2021 to January 2022 with eight women randomized to outpatient induction and four women randomized to inpatient induction. Verbatim transcribed interviews were analyzed using Graneheim and Lundman's content analysis. Three main categories emerged: the required framework around outpatient labor induction, what felt better at home and what felt safer at the hospital. To feel secure at home, women needed sufficient information, close follow-up while at home, and an easy-to-administer induction method. Outpatient labor induction gave women the opportunity of constant support from the partner and increased freedom of movement and self-expression. Some expressed relief over being randomized to inpatient labor induction, because of easy access to health providers, fetal monitoring, and not risking giving birth before arrival to the hospital. Women stressed the importance of being given a choice. Outpatient labor induction contributed to a positive birth experience and should be considered as an alternative for women with low-risk pregnancies. Shared decision-making, including the opportunity for women to change their mind, is essential as induction and early labor affects women's whole childbirth experience.

Reference-range of arterial stiffness by cardio-ankle vascular index in normal pregnancy

ObjectiveTo establish the arterial stiffness, represented by the cardio-ankle vascular index (CAVI) at various gestational ages among low-risk pregnant women. The second objective is to construct the reference range of mean arterial pressure and maternal heart rate during pregnancy. MethodsThis cross-sectional study was conducted on low risk pregnant Thai women, meeting the following inclusion criteria: 1) singleton pregnant women aged 18 years old or over; 2) gestational age between 11 and 40 weeks; 3) low-risk pregnancy without any underlying medical diseases; and 4) known final pregnancy outcomes. Pregnancy-induced hypertension, gestational diabetes and fetal growth restriction were excluded. The mean CAVI, mean arterial pressure (MAP), and heart rate were measured at each gestational age. ResultsA total of 329 measurements for each parameter were available for analysis. CAVI was significantly correlated with gestational age with the best fitted model: CAVI = 6.952 – 0.076(GA) + 0.001(GA)2; SD = 0.742 (R2 = 0.049; p-value < 0.001). The maternal age and pre-pregnancy BMI were correlated with CAVI. CAVI gradually increased with maternal age and decreased with increasing body mass index (BMI). The MAP and heart rate of normal pregnancy in each gestation were conducted. ConclusionThe reference range of CAVI in normal pregnancies as a function of gestational age and the model for predicting CAVI based on multiple regression analysis are constructed and presented. These reference ranges may be useful in predicting risk of cardiovascular disorders during pregnancy.