Risk Factors For Postpartum Hemorrhage Research Articles

IJCM_80A: A Study on Risk factors and outcome of post partum hemorrhage among postnatal mothers attending a tertiary care hospital in Guntur District

Background: Post Partum Haemorrhage (PPH) is a major cause of maternal mortality and morbidity worldwide. PPH is the most common form of major obstetric haemorrhage. Majority of deaths due to PPH are reported to be in developing countries and the major factors responsible were attributed to lack of access to reproductive health services, availability of skilled health personnel, timely intervention of obstetric emergencies and others such as appropriate equipment and supplies. With increase in rate of institutional deliveries and improvement in quality of services MMR can further be reduced with focus on the factors responsible for maternal deaths. Objective: The study was aimed to identify risk factors of postpartum hemorrhage among postnatal mothers and to analyze various factors and determinants that influence the outcome among mothers with PPH. Methodology: This was a descriptive observational retrospective study conducted in Department of obstetrics and Gynecology, government general hospital, Guntur. The target population included 50 postnatal mothers diagnosed as having PPH. Other causes of hemorrhage not related to delivery such as accidents and women with preexisting medical and other conditions were excluded. Data was collected from the available medical records Results: The prevalence of PPH was 0.96%. The causative factors identified were atonic uterus (80%), traumatic delivery (17.5%) and retained bits (1.7%). Induced labor (16%), prolonged labor (11.1%) and preeclampsia (3.4%) were the risk factors that lead to PPH. The mortality was 4% (2) and the cause of death in the 2 patients was due to shock. Conclusion: In the present study, the prevalence of postpartum hemorrhage (PPH) was recorded at 0.96%. Uterine atony emerged as the primary contributing factor, with induced labor identified as the leading risk factor associated with an increased predisposition to PPH. Shock stood out as the predominant cause of mortality.

Incidence and Antepartum Risk Factors of Severe Postpartum Haemorrhage in Anaemic Pregnant Women in Lagos, Nigeria: A Secondary Cohort Analysis.

The magnitude and risk factors for postpartum haemorrhage (PPH) have been extensively investigated, although little is currently known about the incidence and predictors of severe PPH, specifically among women affected by prenatal anaemia in Nigeria. The study determined the incidence and antepartum risk factors of severe PPH in anaemic pregnant women in five health institutions in Lagos, Southwest Nigeria. A secondary analysis was performed using the data of pregnant women with anaemia from the "Predict-PPH" study that was conducted between January and June 2023. This study included n=570 pregnant women affected by anaemia who gave birth in five hospitals in the Lagos metropolis of Nigeria. The study outcome was severe PPH, defined as an estimated blood loss of at least 1000 mL within 24 hours of childbirth. A backward stepwise conditional approach in a multivariable logistic regression model was utilised to identify the independent risk factors for severe PPH in anaemic pregnant women. Of the 570 women with prenatal anaemia enrolled in the primary study, 42 (7.4%) had severe PPH. The identified independent risk factors for severe PPH were maternal obesity (adjusted OR = 3.85, 95% CI = 1.85-8.02), antepartum haemorrhage in index pregnancy (adjusted OR = 2.98, 95% CI = 1.29-6.90), uterine fibroids (adjusted OR = 6.10, 95% CI = 2.39-15.52), delivery gestational age ≥39 weeks (adjusted OR = 2.62, 95% CI = 1.23-5.56), and delivery by caesarean birth (adjusted OR = 16.75, 95% CI = 5.81-48.31). About one in 13 anaemic pregnant women enrolled in the study developed severe PPH during childbirth. Maternal obesity, antepartum bleeding in the current pregnancy, co-existing uterine fibroids in pregnancy, delivery gestational age beyond 38 weeks, and caesarean birth in the current pregnancy were factors that were significantly associated with severe PPH in anaemic pregnant women. These findings underscore the importance of increased vigilance during both the antenatal and peripartum periods to identify women with these risk factors for the initiation of timely interventions to prevent severe PPH.

Risk factors for early postpartum hemorrhage: A retrospective, population-based, cohort analysis.

To identify risk factors for developing early postpartum hemorrhage (PPH) and to examine whether risk factors vary according to severity and mode of delivery. A population-based cohort study was conducted in which all deliveries at a tertiary medical center were included. Risk factors for developing early PPH were compared based on the severity of bleeding as well as the mode of delivery. Multiple logistic regression models were used to control for confounders. Among 322 497 deliveries included in the analysis, early PPH complicated 1811 (0.56%) of all deliveries. Among all cases of early PPH, 505 deliveries (28%) were complicated with severe PPH. Using a logistic regression model, invitro fertilization (IVF) pregnancy, previous cesarean delivery (CD), pre-eclampsia, placental abruption, and uterine rupture were independently associated only with severe early PPH, while non-progressive second stage of labor, induction of labor, and large for gestational age were independently associated with both severe and mild early PPH. When applying an additional logistic regression model, whereas IVF pregnancy, pre-eclampsia, and large for gestational age were independently associated with early PPH among vaginal deliveries only, placenta previa was independently associated with early PPH among CD only. Independent risk factors for developing severe PPH solely include IVF pregnancy, previous CD, pre-eclampsia, placental abruption, and uterine rupture. IVF pregnancy, pre-eclampsia, and large for gestational age are independent risk factors for early PPH following vaginal delivery, while placenta previa is independently associated with early PPH after CD only. Due to the recognition of the importance of both the provider and institutional planning and preparation for PPH, the study's results should be viewed within the scope of its retrospective cohort design.

Risk factors for postpartum hemorrhage in twin pregnancies with cesarean section.

The rates of twin pregnancies and cesarean section have increased in recent years, and both of them are at high risks of postpartum hemorrhage (PPH). However, few studies have concentrated on the risks of PPH in twin pregnancies and cesarean deliveries. In this study, we aimed to identify the risk factors for PPH among twin-pregnant women with cesarean section. This was a retrospective observational study including 1,649 women with twin pregnancies delivered by cesarean section from 2016 to 2022 in the Second Affiliated Hospital of Wenzhou Medical University, China. The eligible women were divided into PPH group (n = 116) and non-PPH group (n = 1,533) according to the blood loss after delivery within 24 h. The baseline maternal and perinatal characteristics were compared between the two groups. Logistic regression analysis was conducted to identify the potential risk factors for PPH. We found nulliparity, assisted reproductive technology (ART) usage, preeclampsia or HELLP syndrome, placenta previa, placenta accreta and general anesthesia were more common in PPH group than non-PPH group (P < 0.05). Women in PPH group had higher maternal body mass index at delivery and higher combined birthweight of the twins than non-PPH group, but had lower parity (P < 0.05). Seven independent risk factors for PPH were identified after logistic regression analysis: ART usage (OR 2.354 95% CI 1.357-4.083, P = 0.002), preeclampsia or HELLP syndrome (OR 2.605, 95% CI 1.471-4.616, P = 0.001), placenta previa (OR 7.325, 95% CI 3.651-14.697, P < 0.001), placenta accreta (OR 6.296, 95% CI 1.316-30.12, P = 0.021), thrombocytopenia (OR 1.636, 95% CI 1.056-2.535, P = 0.027), general anesthesia (OR 2.394, 95% CI 1.223-4.686, P = 0.011), and combined birthweight (OR 1.00032, 95% CI 1.00005-1.00059, P = 0.020). Collectively, in women with twin pregnancies delivered by cesarean section, the use of ART, preeclampsia or HELLP syndrome, placenta previa, placenta accreta, thrombocytopenia, general anesthesia and the combined birthweight were identified as independent risk factors for PPH. More attention should be paid to women with these risk factors.

Predicting risk of postpartum hemorrhage associated with vaginal delivery of twins: A retrospective study.

Many studies have only focused on the risk factors for postpartum hemorrhage (PPH) in singleton vaginal deliveries and twin cesarean deliveries. We analyzed the factors of influencing PPH occurrence in twin vaginal deliveries and developed a nomogram for clinical application. This retrospective study included 274 pregnant women with twin pregnancies who were hospitalized for delivery from January 2014 to December 2018. The patients opted for vaginal delivery and experienced spontaneous labor. Univariate analysis of PPH risk factors was performed. Multivariate analysis was performed using the least absolute shrinkage and selection operator (LASSO) to obtain relevant factors and build a prediction model, which was presented as a nomogram. The model was internally validated by bootstrap self-sampling method. Model accuracy was evaluated with the concordance index (C-index). There were 36 (13.14%) and 238 (86.9%) patients in the PPH and no PPH groups, respectively. Univariate analysis identified twin chorionicity, hypertensive disorders complicating pregnancy (HDCP), anemia in pregnancy, delivery mode of the second twin, oxytocin use during labor, postpartum curettage, cervical laceration, intrapartum fever, fibrinogen degradation products (FDP), and platelet count (PLT) as significant PPH factors. On multivariate analysis, HDCP, anemia in pregnancy, intrapartum fever, oxytocin use during labor, fetal distress, PLT, direct bilirubin, and FDP were noted as significant PPH factors and were included in the prediction model. A C-index of 0.816 was noted after internal validation, and the calibration curve showed good consistency. We developed a model to predict PPH risk in the vaginal delivery of twin pregnancies and visualized it with a nomogram that can be applied clinically to assess PPH risk and aid PPH prevention.

Risk Factor for Postpartum Hemorrhage in The Post-Disaster (2019-2021)

The earthquake disaster in Palu in 2018, followed by the pandemic in 2020, caused mobility to be hampered and affected people's habits and lifestyles, who mostly stayed at home and had no activities. This also affected pregnant women who just stayed at home because they were afraid. The impact of the pandemic will result in less physical activity and less interaction with health workers, causing pregnant women to experience macrosomia. This research aims to determine the risk factors for postpartum hemorrhage at Anutapura Public Hospital in Palu. This research was an analytic observational with a case-control approach. Case subjects were mothers who experienced postpartum hemorrhage, and controls were mothers who did not experience postpartum hemorrhage. Case samples were 67 people, and controls were 67 people with age matching. A simple random sampling technique was carried out for sampling. The data source used secondary data, medical records for 2019-2021. Data analysis used the odds ratio test. The results showed that macrosomia (OR=4.543 and CI=1.421-14.528), prolonged labor (OR=3.674 and CI=1.720-7.850), and parity (OR=2.452 and CI=1.199-5.014) a risk factor for postpartum hemorrhage. Postpartum hemorrhage is significantly associated with low-risk macrosomia, low-risk parity, and safe parity

Risk factors for postpartum haemorrhage in women with histologically verified placenta accreta spectrum disorders: a retrospective single-centre cross-sectional study

BackgroundPlacenta accreta spectrum (PAS) disorders have been reported with an increasing frequency of up to 3%. The increase in the incidence can be explained by the rising rate of Caesarean section (CS), assisted reproductive technology (ART) and previous uterine surgeries. PAS disorders are usually associated with postpartum haemorrhage (PPH). In our study, we investigated the risk factors for increased blood loss in women with histologically verified PAS disorders independent of delivery mode.MethodsIn a retrospective single-centre cross-sectional study, 2,223 pregnant women with histologically verified PAS disorders were included. Risk factors for PPH in women with PAS disorders were examined and compared between women with PPH (study group; n = 879) and women with normal blood loss (control group; n = 1150), independent of delivery mode. PAS disorders were diagnosed histologically from the following specimens: placenta, placental-bed specimens, uterine curettage, uterine resection and/or total/partial hysterectomy. Medical data were extracted from clinical records of pregnant women with PAS disorders delivering at the University Hospital Basel between 1986 and 2019. The placenta data of women with PAS disorders were obtained and identified through a search from the database of the Department of Pathology, University Hospital Basel.ResultsBetween 1986 and 2019, there were 64,472 deliveries at the University Hospital Basel. PAS disorders were histologically verified in 2,223 women (2,223/64,472), and the prevalence of PAS disorders was 3.45%. A total of 879 women with PAS disorders showed PPH, independent of delivery mode (43.3%). Due to missing data for 194 women, the final analysis was conducted with the remaining 2,029 women. Placenta praevia (O.R. = 6.087; 95% CI, 3.813 to 9.778), previous endometritis (O.R. = 3.011; 95% CI, 1.060 to 9.018), previous manual placenta removal (O.R. = 2.530; 95% CI, 1.700 to 3.796), ART (O.R. = 2.169; 95% CI, 1.593 to 2.960) and vaginal operative birth (O.R. = 1.715; 95% CI, 1.225–2.428) can be considered important risk factors, and previous CS (O.R. = 1.408; 95% CI, 1.016 to 1.950) can be considered a moderate potential risk factor of PPH in women with PAS disorders.ConclusionsPlacenta praevia, previous endometritis, previous placenta removal, ART and vaginal operative birth can be considered important risk factors of PPH in women with PAS disorders.Study registrationThe study was registered under http://www.ClinicalTrials.gov (NCT05542043) on 15 September 2022.

Postpartum haemorrhage occurring in UK midwifery units: A national population-based case-control study to investigate incidence, risk factors and outcomes.

To estimate the incidence of, and investigate risk factors for, postpartum haemorrhage (PPH) requiring transfer to obstetric care following birth in midwifery units (MU) in the UK; to describe outcomes for women who experience PPH requiring transfer to obstetric care. We conducted a national population-based case-control study in all MUs in the UK using the UK Midwifery Study System (UKMidSS). Between September 2019 and February 2020, 1501 women with PPH requiring transfer to obstetric care following birth in an MU, and 1475 control women were identified. We used multivariable logistic regression, generating adjusted odds ratios (aORs) and 95% confidence intervals (CIs) to investigate risk factors for PPH requiring transfer to obstetric care. The incidence of PPH requiring transfer to obstetric care following birth in an MU was 3.7% (95% CI 3.6%-3.9%). Factors independently associated with PPH requiring transfer to obstetric care were smoking during pregnancy (aOR = 0.73; 95% CI 0.56-0.94), nulliparity (aOR = 1.96; 95% CI 1.66-2.30), previous PPH (aOR = 2.67; 95% CI 1.67-4.25), complications in a previous pregnancy other than PPH (aOR = 2.40; 95% CI 1.25-4.60), gestational age ≥41 weeks (aOR = 1.36; 95% CI 1.10-1.69), instrumental birth (aOR = 2.69; 95% CI 1.53-4.72), third stage of labour ≥60 minutes (aOR = 5.56; 95% CI 3.93-7.88), perineal trauma (aOR = 4.67; 95% CI 3.16-6.90), and birthweight 3500-3999g (aOR = 1.71; 95% CI 1.42-2.07) or ≥4000g (aOR = 2.31; 95% CI 1.78-3.00). One in ten (10.6%) cases received a blood transfusion and one in five (21.0%) were admitted to higher level care. The risk factors identified in this study align with those identified in previous research and with current guidelines for women planning birth in an MU in the UK. Maternal outcomes after PPH were broadly reassuring and indicative of appropriate management. NHS organisations should ensure that robust guidelines are in place to support management of PPH in MUs.

Plasenta previa tanısı olan gebelerde hafif trombositopeni ile postpartum kanama ilişkisi

ABSTRACT&#x0D; Aim&#x0D; Postpartum hemorrhage (PPH) is a major cause of maternal mortality and morbidity. Although thrombocytopenia is one of the known risk factors for postpartum hemorrhage, little is known about the effect of mild thrombocytopenia on PPH. The current study aimed to investigate the relationship between postpartum hemorrhage and mild thrombocytopenia in pregnant women with placenta previa. &#x0D; Method&#x0D; We conducted a retrospective cohort study of pregnant women who underwent placenta previa surgery between October 1, 2019 and May 1, 2022. Women with mild thrombocytopenia (platelet count 100,000-149,999/ µl) comprised the study group. The women in the control group had normal platelet counts (platelet count 150.000- 450.000 / µl). The outcome was the incidence of postpartum hemorrhage which is a combination of one or more of the following: 1) the requirement for a transfusion of pRBC during the intraoperative or postpartum period; 2) a decrease in Hb levels of at least 3 gr/dL postpartum compared to prepartum.&#x0D; Results&#x0D; There were 170 women in the study; 30 were in the group with mild thrombocytopenia and 140 were in the control group. Mild thrombocytopenia was found to be associated with postpartum hemorrhage (adjusted odds ratio: 3.90 95% CI: 1.56-9.72). Also in the mild thrombocytopenia group, the number of patients receiving blood transfusion and Hb decline &gt;3 g/dL were significantly higher compared to the control group (p

Postpartum hemorrhage in Sub-Saharan Africa—a prospective study in metropolitan Mozambique

BackgroundEstimates indicate approximately ≈500 to 1000 maternal deaths per 100,000 live births in Sub-Saharan Africa (SSA) (vs ≈5-20 in developed countries). Postpartum hemorrhage (PPH) seems a major contributor to maternal mortality (MM), but there are no comprehensive data for the region. ObjectivesAnalyze MM, PPH, and associated risk factors. MethodsWe collected prospective data on MM, PPH, and associated risk factors in metropolitan Mozambique. We recorded consecutive deliveries at the Maputo Central Hospital between February 2019 and January 2021. Data included age, HIV status, parity, delivery mode, notes, vital signs, laboratory values, and fetal parameters. PPH was determined by charted diagnosis, blood loss of >500 mL, transfusion, and/or notes indicating significant bleeding. ResultsOf 8799 deliveries, ≈40% occurred in women residing outside Maputo City (“nonlocal”), with similar demographic characteristics between local and nonlocal women. However, compared with local women, nonlocal women had worse outcomes, including higher rates of MM (1.52% vs 0.78%; P =.0012) and PPH (16.51% vs 12.39%; P <.0001), whereby PPH was strongly associated with MM (adjusted odds ratio = 5.56; P <.0001). Almost all women with uterine atony (≈1%) experienced PPH. For women receiving laboratory tests on admission (drawn only if in distress; local, n = 561; nonlocal, n = 514), both cohorts revealed similar distributions of hemoglobin levels and platelet counts. Prepartum anemia (≈57%) and thrombocytopenia (≈21%) were prominent risk factors for PPH; risk increased with increasing severity and was additive in the presence of both. ConclusionsPPH is a serious problem in Maputo province, a metropolitan area of SSA, portending high MM. Identification of correctable risk factors, including anemia, should catalyze the development of region-specific prevention protocols.

Fibrinolytic potential as a risk factor for postpartum hemorrhage.

Postpartum hemorrhage (PPH) is still the leading cause of maternal morbidity and mortality worldwide. While impaired fibrin polymerization plays a crucial role in the development and progress of PPH, recent approaches using viscoelastic measurements have failed to sensitively detect early changes in fibrinolysis in PPH. This study aimed to evaluate whether women experiencing PPH show alterations in POC-VET fibrinolytic potential during childbirth and whether fibrinolytic potential offers benefits in the prediction and treatment of PPH. Blood samples were collected at three different timepoints: T0 = hospital admission (19 h ± 18 h prepartum), T1 = 30-60 min after placental separation, and T2 = first day postpartum (19 h ± 6 h postpartum). In addition to standard laboratory tests, whole-blood impedance aggregometry (Multiplate) and viscoelastic testing (VET) were performed using the ClotPro system, which included the TPA-test lysis time, to assess the POC-VET fibrinolytic potential, and selected coagulation factors were measured. The results were correlated with blood loss and clinical outcome markers. Severe PPH was defined as a hemoglobin drop > 4g/dl and/or the occurrence of shock or the need for red blood cell transfusion. Blood samples of 217 parturient women were analyzed between June 2020 and December 2020 at Heidelberg University Women's Hospital, and 206 measurements were eligible for the final analysis. Women experiencing severe PPH showed increased fibrinolytic potential already at the time of hospital admission. When compared to non-PPH, the difference persisted 30-60 min after placental separation. A higher fibrinolytic potential was accompanied by a greater drop in fibrinogen and higher d-dimer values after placental separation. While 70% of women experiencing severe PPH showed fibrinolytic potential, 54% of those without PPH showed increased fibrinolytic potential as well. We were able to show that antepartal and peripartal fibrinolytic potential was elevated in women experiencing severe PPH. However, several women showed high fibrinolytic potential but lacked clinical signs of PPH. The findings indicate that high fibrinolytic potential is a risk factor for the development of coagulopathy, but further conditions are required to cause PPH.

Establishment of a predictive model for postpartum hemorrhage in twins: a retrospective study

ObjectiveTo explore the risk factors and develop a predictive model for postpartum hemorrhage in twin pregnancies.MethodsAll patients who gave birth at Ningbo Women and Children’s Hospital from January 2018 to August 2022 were recruited. Patients were randomly allocated to a training cohort (n=1395) validation cohort (n=650) at a 7:3 ratio. In the training cohort, LASSO regression for screening variables and multifactorial logistic regression analysis were performed to identify independent risk factors for postpartum hemorrhage in twin pregnancies. A nomogram was established based on the results of multiple logistic regression analysis. Nomogram performance was quantified using the receiver operating characteristic curve, Hosmer- Lemeshow test and decision curve analysis.ResultsA total of 2045 patients were included in this study. Multifactorial Logistic regression analysis showed maternal age, assisted reproduction, platelet count, fibrinogen level, albumin level, hypertensive disorders of pregnancy, placenta praevia, number of previous cesarean deliveries, number of previous intrauterine manipulation, and neonatal weight were independent risk factors for postpartum hemorrhage in twin births. The area under curve (AUC) for the training cohort was 0.810 [95% CI (0.781, 0.839)], with a sensitivity of 76.5%, specificity of 71.0%, and positive and negative predictive values of 0.358 and 0.935, respectively, while the AUC for the validation cohort was 0.821 [95% CI (0.781, 0.860)], with a sensitivity of 80.9%, specificity of 69.49%, and positive predictive value and negative predictive value of 0.426 and 0.929, respectively.ConclusionThe predictive model can effectively and quantitatively assess the risk of postpartum hemorrhage in twin pregnancies and help clinicians to take personalized preventive measures.

Anemia Prenatal is A Risk Factor for Postpartum Hemorrhage

Postpartum Hemorrhagic is still the main cause of maternal death. While anemia is a major contributor to maternal morbidity, therefore, to prevent Postpartum Hemorrhagic (PPH), it is important to be aware of the occurrence of anemia during pregnancy. The purpose of this study was to determine the relationship between anemia in pregnancy and postpartum hemorrhagic events at the Sukodono Health Center, Sidoarjo. This research is an observational study with a cross sectional approach. The population in this study was 125 respondents, a sample of 42 respondents was obtained using purposive sampling technique. Data collection used secondary data (medical records January - December 2022). Data were analyzed using the Fisher's Exact Test statistic with a significance level of α (0.05). The results showed that the ρ-value = 0.008, meaning that ρ (0.008) &lt; α (0.05) or H1 is accepted: there is a relationship between anemia in pregnancy and the incidence of postpartum hemorrhagic (PPH) at the Sukodono Health Center, Sidoarjo Regency. Pregnancy with anemia in the third trimester has a high risk of experiencing Postpartum Hemorrhagic, so it is necessary to increase awareness of anemia by optimizing integrated antenatal care services.

Enhancing postpartum hemorrhage prediction in pernicious placenta previa: a comparative study of magnetic resonance imaging and ultrasound nomogram.

Objective: To explore the risk factors of postpartum hemorrhage (PPH) in patients with pernicious placenta previa (PPP) and to develop and validate a clinical and imaging-based predictive model. Methods: A retrospective analysis was conducted on patients diagnosed surgically and pathologically with PPP between January 2018 and June 2022. All patients underwent PPP magnetic resonance imaging (MRI) and ultrasound scoring in the second trimester and before delivery, and were categorized into two groups according to PPH occurrence. The total imaging score and sub-item prediction models of the MRI risk score/ultrasound score were used to construct Models A and B/Models C and D. Models E and F were the total scores of the MRI combined with the ultrasound risk and sub-item prediction model scores. Model G was based on the subscores of MRI and ultrasound with the introduction of clinical data. Univariate logistic regression analysis and the logical least absolute shrinkage and selection operator (LASSO) model were used to construct models. The receiver operating characteristic curve andision curve analysis (DCA) were drawn, and the model with the strongest predictive ability and the best clinical effect was selected to construct a nomogram. Internal sampling was used to verify the prediction model's consistency. Results: 158 patients were included and the predictive power and clinical benefit of Models B and D were better than those of Models A and C. The results of the area under the curve of Models B, D, E, F, and G showed that Model G was the best, which could reach 0.93. Compared with Model F, age, vaginal hemorrhage during pregnancy, and amniotic fluid volume were independent risk factors for PPH in patients with PPP (p < 0.05). We plotted the DCA of Models B, D, E, F, and G, which showed that Model G had better clinical benefits and that the slope of the calibration curve of Model G was approximately 45°. Conclusion: LASSO regression nomogram based on clinical risk factors and multiple conventional ultrasound plus MRI signs has a certain guiding significance for the personalized prediction of PPH in patients with PPP before delivery.

Risk factors for severe postpartum hemorrhage requiring blood transfusion after cesarean delivery for twin pregnancy: a nationwide cohort study.

Postpartum hemorrhage (PPH) is a leading cause of maternal morbidity and mortality. Twin pregnancy and cesarean delivery are well-known risk factors for PPH. However, few studies have investigated PPH risk factors in mothers who have undergone cesarean delivery for twin pregnancies. Therefore, this study investigated the risk factors associated with severe PPH after cesarean delivery for twin pregnancies. We searched and reviewed the Korean Health Insurance Review and Assessment Service's claims data from July 2008 to June 2021 using the code corresponding to cesarean delivery for twin pregnancy. Severe PPH was defined as hemorrhage requiring red blood cell (RBC) transfusion during the peripartum period. The risk factors associated with severe PPH were identified among the procedure and diagnosis code variables and analyzed using univariate and multivariate logistic regressions. We analyzed 31,074 cesarean deliveries for twin pregnancies, and 4,892 patients who underwent cesarean deliveries for twin pregnancies and received RBC transfusions for severe PPH were included. According to the multivariate analysis, placental disorders (odds ratio, 4.50; 95% confidence interval, 4.09-4.95; P < 0.001), general anesthesia (2.33, 2.18-2.49; P < 0.001), preeclampsia (2.20, 1.99-2.43; P < 0.001), hemolysis, elevated liver enzymes, low platelets (HELLP) syndrome (2.12, 1.22-3.68; P = 0.008), induction failure (1.37, 1.07-1.76; P = 0.014), and hypertension (1.31, 1.18-1.44; P < 0.001) predicted severe PPH. Placental disorders, hypertensive disorders such as preeclampsia and HELLP syndrome, and induction failure increased the risk of severe PPH after cesarean delivery for twin pregnancy.

Risk factors for postpartum haemorrhage in twin pregnancies and haemorrhage severity.

This study evaluated risk factors for postpartum haemorrhage (PPH) in twin pregnancies, particularly factors associated with major PPH (blood loss of >1000 mL), to facilitate identification of high-risk twin pregnancies. This retrospective cohort study included all women with twin pregnancies who delivered at a tertiary obstetric unit in Hong Kong from 2009 to 2018 and experienced PPH (blood loss of ≥500 mL). Postpartum haemorrhage was classified using three thresholds for blood loss volume: ≥500 mL (all PPH), >1000 mL (major PPH), and >1500 mL (severe PPH). Risk factors for each threshold of PPH were analysed. In total, there were 680 twin pregnancies. The overall incidence of all PPH (≥500 mL) in this cohort was 27.8%, including minor PPH (500-1000 mL, 20.1%), major but not severe PPH (1001-1500 mL, 4.4%), and severe PPH (>1500 mL, 3.2%). Logistic regression analysis showed that general anaesthesia and the use of oxytocin were significant risk factors for all PPH (≥500 mL); general anaesthesia, in vitro fertilisation, antepartum haemorrhage, placental abruption, and placenta praevia were significant risk factors for major PPH (>1000 mL); in vitro fertilisation, placenta praevia, and obesity were significant risk factors for severe PPH (>1500 mL). Women with twin pregnancies who have obesity, conception by in vitro fertilisation, or placenta praevia exhibit a high risk of severe PPH. They should deliver in obstetric units with readily available blood product transfusions and the appropriate expertise for prompt management of severe PPH.

Risk factors for postpartum hemorrhage after elective cesarean deliveries for twin pregnancies.

To identify the high-risk factors associated with postpartum hemorrhage (PPH) after an elective cesarean delivery of twins. This retrospective cohort study included all women with twin gestations who chose to have an elective cesarean delivery after 28 weeks of gestation at at the Women's Hospital, School of Medicine, Zhejiang University between September 2014 and April 2019. Women with an intrauterine fetal demise of one or both twins were excluded. PPH was defined as an estimated blood loss of ≥ 1,000 mL within 24 h of birth. A total of 532 women were analyzed and classified into the PPH group (n = 70) and the no-PPH group (n = 462). Univariate and multivariate logistic regression analyses were performed to assess the independent risk factors. Among the 532 women pregnant with twins, PPH occurred in 13.2% women (n = 70). There were statistically significant differences in preeclampsia (p = 0.005), premature rupture of membrane (PROM, p < 0.001), placenta previa (p < 0.001), anemia [hemoglobin (Hb) < 100 g/L; p = 0.003], and antenatal magnesium sulfate (MgSO₄) use (p < 0.001) between the two groups. However, the following were the independent risk factors for PPH after an elective cesarean delivery for a twin pregnancy: preeclampsia [odds ratio (OR): 2.91; 95% confidence interval (CI): 1.33-6.36], PROM (OR: 8.57; 95% CI: 2.54-28.89), placenta previa (OR: 9.46; 95% CI: 3.59-24.89), antenatal MgSO₄ use (OR: 7.64; 95% CI; 3.18-18.41), and anemia (Hb < 100 g/L; OR: 2.68; 95% CI: 1.42-5.06). Preeclampsia, PROM, placenta previa,and antenatal MgSO₄ use were the risk factors for PPH after an elective cesarean delivery for twin pregnancies. Risk factor identification and prevention should be a priority.

Prevention of Post-Partum Hemorrhage: Comparison of Oxytocin and Misoprostol. A Two center study in the Bamenda and Nkwen Health Districts

Background: Postpartum hemorrhage is one of the most common obstetrical complications affecting up to 18% of deliveries. Globally, it is responsible for 35 – 55% of peripartum maternal deaths. In Cameroon, the maternal mortality rate is at 406 maternal death per 100,000 live births, with PPH being the leading cause accounting for about 25%. This study aimed to compare the efficacy and safety of misoprostol versus oxytocin in the prevention of postpartum hemorrhage in the Bamenda Health District and Nkwen Health District. Methods: This was a hospital-based randomized clinical trial study in the Bamenda Regional Hospital and Nkwen District Hospital. The study was conducted from March 1st to May 31st 2021 including pregnant women who delivered at the maternity at these two hospitals. All their pregnancy was singleton gestation at term and haven given their informed consent. Women with known history of cardiac, renal, hepatic diseases or any coagulopathy, Cesarean delivery were excluded. We randomized 308 participants in a 1:1 ratio to receive 800 μg of oral misoprostol or 10IU of oxytocin intramuscularly during the active management of third stage of labor (AMSTL). The Hemoglobin (Hb) concentration and hematocrit (HCT) of the participants were measured before and 24hrs after delivery. Our primary outcome of interest was (Post-Partum Hemorrhage) PPH, defined as Hb change ≥ 1g/dl within 24hrs of delivery. Secondary outcomes included; mean Hb change, Hb change ≥2g/dl (severe PPH). Dichotomous outcomes between study groups were compared by estimating crude relative risks (RRs) with 95% confidence intervals. Logistic regression (the chi-square test) was done to determine the factors associated with the occurrence of postpartum hemorrhage, with a level of significance at 5%. Results: After 24hrs, Postpartum hemorrhage (PPH) occurred in 41 (26.6%) and 47 (30.5%) participants in the misoprostol and oxytocin groups respectively (RR= 0.87, 95% C.I= 0.61 - 1.24, p=0.449). Severe postpartum hemorrhage occurred in 3 (1.9%) and 5 (3.2%) participants in the misoprostol and oxytocin groups respectively (RR= 0.6, 95% C.I=0.15 - 2.47, p=0.723). Past history of PPH (aOR=10.1 (3.5 – 28.6), p&lt;0.0001), augmentation of labor (aOR=3.4 (1.6 – 7.1), p=0.0011), fetal birth weight ≥3.5Kg (aOR=2.5 (1.3 – 4.8), p=0.0074) and retained products (aOR= 8.4 (4.2 – 16.7), p&lt;0.0001) were risk factors of PPH. Participants in the misoprostol group more commonly experienced shivering (RR 3.2, 95% CI 2.0 - 5.1, p&lt;0.0001) and nausea/vomiting (RR 35.5, 95% CI 8.9 – 142.2, p&lt;0.0001). Conclusion: Oral misoprostol at the dose of 800μg is as effective as 10 IU IM Oxytocin in the prevention of PPH and is a potent alternative to oxytocin. Most common risk factors of PPH are past history of PPH, augmentation of labor, fetal weight ≥ 3.5kg and retained products. Side effects were mostly associated with 800μg of oral Misoprostol.

Family history of postpartum hemorrhage is a risk factor for postpartum hemorrhage after vaginal delivery: results from the French prospective multicenter Haemorrhages and Thromboembolic Venous Disease of the Postpartum cohort study

Postpartum hemorrhage (PPH) is a major component of perinatal morbidity and mortality affecting young women worldwide, and is still often unpredictable. Reducing the incidence of PPH is a major health issue, and identifying women at risk for PPH is a key element in preventing this complication. To estimate PPH prevalence after vaginal delivery and to identify PPH risk factors. Unselected pregnant women ≥ 16 years attending one of six maternity wards in Brittany (France) for vaginal birth after 15 weeks of gestation were recruited in this prospective multicenter cohort study between June 1, 2015 and January 31, 2019. PPH was defined as a blood loss ≥ 500 mL in the 24 hours following delivery. Independent risk factors for PPH were determined by logistic regression. Missing data were compensated by multiple imputation (MICE method). Among 16,382 included women, PPH prevalence was 5.37%. A first-degree family history of PPH (aOR = 1.63, 95%CI 1.24-2.14) and a personal transfusion history (aOR = 1.90, 95%CI 1.23-2.92) were significantly associated with PPH. The use of oxytocin during labor was also a risk factor for PPH (aOR = 1.24, 95%CI 1.06-1.44). Inversely, smoking during pregnancy and intrauterine growth restriction were associated with a reduced risk of PPH (aOR = 0.76, 95%CI 0.63-0.91, and 0.34, 95%CI 0.13-0.87, respectively). In addition to classical risk factors, this study identified PPH family history and personal transfusion history as new characteristics associated with PPH after vaginal delivery. The association of PPH with a family history of PPH suggests a hereditary hemorrhagic phenotype and calls for genetic studies. Identifying women at risk for PPH is a key element in being prepared for this complication.

Incidence and Risk Factors for Postpartum Hemorrhage: A Case-Control Study in a Tertiary Hospital in Greece.

Background and Objectives: Postpartum hemorrhage (PPH) is an obstetrical emergency and although the mortality rate from PPH has decreased, it is still considered a challenge in obstetrics. This study aimed to estimate the rate of primary PPH, as well as to investigate the potential risk factors and management options. Material and methods: This was a retrospective case-control study of all cases with PPH (blood loss > 500 mL, irrespective of the mode of delivery) managed in the Third Department of Obstetrics and Gynecology, Aristotle University of Thessaloniki, Greece, from 2015 to 2021. The ratio of cases to controls was estimated to be 1:1. The chi-squared test was used to examine if there was any relationship between several variables and PPH, while subgroup multivariate logistic regression analyses of certain causes of PPH were also conducted. Results: During the study period, from a total of 8545 births, 219 (2.5%) pregnancies were complicated with PPH. A maternal age > 35 years (OR: 2.172; 95% CI: 1.206-3.912; p = 0.010), preterm delivery (<37 weeks) (OR: 5.090; 95% CI: 2.869-9.030; p < 0.001) and parity (OR: 1.701; 95% CI: 1.164-2.487; p = 0.006) were identified as risk factors for PPH. Uterine atony was the main cause of PPH in 54.8% of the women, followed by placental retention in 30.5% of the sample. Regarding management, 57.9% (n = 127) of the women received uterotonic medication, while in 7.3% (n = 16), a cesarean hysterectomy was performed to control PPH. Preterm delivery (OR: 2.162; 95% CI: 1.138-4.106; p = 0.019) and delivery via a cesarean section (OR: 4.279; 95% CI: 1.921-9.531; p < 0.001) were associated with a higher need for multiple treatment modalities. Prematurity (OR: 8.695; 95% CI: 2.324-32.527; p = 0.001) was identified as an independent predictor for an obstetric hysterectomy. From the retrospective analysis of the births complicated by PPH, no maternal death was identified. Conclusions: Most of the cases complicated with PPH were managed with uterotonic medication. An advanced maternal age, prematurity and multiparity had a significant impact on the occurrence of PPH. More research is needed on the risk factors of PPH, while the establishment of validated predictive models would be of value.