Clinical Obstetrics

(111) Establishing a Risk Score for Prediction of Intrapartum Cesarean Delivery among Elderly Gravidae.

(112) Impact of the ARRIVE Trial on Stillbirth Rates in Nulliparous Individuals

(115) Prolonged second stage of labor (P2S) in primipara, and perinatal outcomes

(117) Pregnancy and delivery outcomes of women who underwent a VBAC with and without epidural analgesia

(118) Mediolateral Episiotomy and Obstetric Anal Sphincter Injuries in Nullipara: A Propensity Score Matching Study

(123) Is maternal intrapartum low-grade fever a risk factor for maternal and neonatal adverse outcomes?

(129) Impact of group prenatal care on postpartum contraception choice and rapid repeat pregnancy

(136) A Systematic Review of Interventions for Opioid Use Disorder during the First Year Postpartum

(144) Changes in cytokine levels during progression in twin gestations and association with pregnancy outcome

(150) Looking for a blueprint for changing patient behavior: Group Prenatal Care improves breastfeeding knowledge

(158) Nulliparas with term PROM and an unfavorable cervix, induction of labor with prostaglandin or oxytocin

(175) Physical activity guidelines are infrequently met during pregnancy, regardless of SPTB history or antepartum hospitalization

(180) Personalized Approach to Predict Twin Mode of Delivery

(189) Pre-Labor Sonographic Assessment of Fetal Station as a Predictor of Cesarean Delivery

(196) Association between Trunk Muscle Mass and Persistent Postpartum Low Back and Pelvic Pain

(199) Preterm low segment transverse cesarean delivery and the risk of uterine rupture in subsequent delivery

(205) Predicting Miscarriage Risk in Individuals with Chronic Illnesses

(209) Validation of Calculator for Cesarean Delivery During Induction of Labor

(216) Perinatal Substance Use Programming: Impact on Maternal and Neonatal Outcomes Among Women with Psychiatric Comorbidities

(223) Uterine rupture among patients with placenta accreta spectrum: pre-labor vs. in -labor

(228) Utility of standardized FIGO descriptors for reporting of intra-operative findings of placenta accreta spectrum disorders.

(230) Trial of Labor or Repeat Caesarean Delivery in Women With Morbid Obesity

(231) Impact of OBTeleflex Program on Delivery Outcomes at an Academic Urban Center

(232) Nipocalimab pharmacokinetic/pharmacodynamic and exposure-response modeling in pregnancies at risk for early-onset severe (EOS) HDFN

(235) Endometriosis and Adverse Pregnancy Outcomes: A Nation-wide Population-Based Study

(248) Changes in low-dose aspirin eligibility and use among nullips after updated USPSTF guidance

(267) Differences in dosing strategies and perinatal outcomes for pregnant patients on buprenorphine compared with methadone

(278) Is Age Just a Number? Advanced Maternal Age and Stillbirth Risk

(279) Advanced Maternal Age and Risk of Pathologic Fetal Growth

(319) Impact of the Oxytocin Shortage on Postpartum Bleeding Outcomes

(324) Assessing Provider Confidence in Counseling Patients about Peripartum Toxicology Testing

(325) Adverse Pregnancy Outcomes in Patients with Congenital Uterine Anomalies: Evaluation of a Large Population Database

(331) Subsequent pregnancies after conservative placenta accreta management: systematic review and meta-analysis

(347) Hyperemesis Gravidarum: Investigating Pregnancy Outcomes by Severity and Time of Diagnosis

(357) Physical Activity and Pregnancy Outcomes Among the nuMoM2b Cohort

(358) Is severe maternal morbidity a risk factor for postpartum mental health hospitalization?

(370) Endometriosis complicated pregnancy: site-specific evaluation of characteristics and maternal morbidity

(383) Candidacy for Regional Anesthesia Stratified by Anticoagulation Type

(387) Duration of Third Stage of Labor and Maternal Hemorrhagic Adverse Outcomes

(395) Factors Associated with Achieving Smoking Cessation for Pregnant Individuals with Substance Use Disorder

(399) Development of a risk scoring system for prediction of blood transfusion during admission for delivery

(400) Association of Trimester-Specific Smoking Cessation and Risk of Stillbirth

(410) Clinical Implications of Group Residential Treatment on Pregnant Individuals with Substance Use Disorder

(417) Does the allowable blood loss calculator predict postpartum blood transfusion?

(423) Cannabis use and development of hypertension in the nuMoM2b Heart Health Study

(427) Delivery and neonatal outcomes associated with delivery versus expectant management following term decreased fetal movement

(433) Does the Timing of Resolution of Low Placentation Affect the Risk of Postpartum Hemorrhage?

(443) Machine Learning for the Prediction of Neonatal Neuroskeletal Injury Following Shoulder Dystocia

(445) Physical activity in pregnant persons with a prior preterm birth: impact of cervical insufficiency (CI)

(453) Association of Insomnia in Pregnancy with Maternal and Neonatal Outcomes

(454) Association of Restless Legs Syndrome with Adverse Perinatal Outcomes

(455) Association of Insomnia in Pregnancy with Cardiovascular Health 2-7 years after first birth

(456) Association of Restless Legs Syndrome in Pregnancy with Cardiovascular Health 2-7 years after first birth

(486) Compliance with national guidelines for aspirin prophylaxis for preeclampsia prevention

(490) Changes in postpartum uterine artery Doppler velocimetry in subjects undergoing conservative management of placenta accreta

(498) Association of shift complexity and volume with cesarean delivery among nulliparous, term, singleton, vertex patients

(503) Fetal and neonatal drug exposure following nipocalimab treatment in pregnant women at risk of EOS-HDFN

(513) Association between maternal anemia and postpartum depression in women with vaginal delivery

(514) Etiology of Severe Early-Onset Fetal Growth Restriction: Implications for Prenatal Diagnosis (The Multicenter PERIMETER Study)

(532) Effect of Low-Dose Aspirin on Preterm Prelabor Rupture of Membranes in Low-Risk Nulliparous Women

(546) Examining the Impact of 1-Week Postpartum Mood Check

(547) Can need for intervention at 1 Week Mood Check Predict Postpartum Depression: A cohort study

(566) Co-occurring Opioid and Stimulant Use Disorders: Is there an Incremental Impact on Adverse Pregnancy Outcomes?

(573) Does the addition of MRI in antenatal management of suspected PAS impact maternal surgical outcome?

(580) Evaluating the Benefit of Obstetrical Interventions on Neonatal Survival in Periviable Twin Pregnancies

(582) Earlier diagnosis of severe cholestasis is associated with adverse pregnancy outcomes

(586) Association of Mode of Delivery for Periviable Birth with Neonatal Outcomes

(590) Does Documentation of Postpartum Hemorrhage Risk Stratification Affect Maternal Outcomes?

(596) Delivery Outcomes in Triplet and Twin versus Singleton Pregnancies with Short Cervix

(599) Differing clinical management for postpartum hemorrhage and associated risk for intensive care unit admission

(603) Differences in dosing strategies and perinatal outcomes for pregnant persons on buprenorphine compared with buprenorphine-naloxone

(614) Childhood Opportunity Index and Severe Morbidity in a cohort complicated by Placenta Accreta Spectrum Disorder

(616) Association between Cotinine Exposure and Outcomes in Patients with Prenatal Cannabis Use: A Secondary Analysis

(617) Associations between Isolated Prenatal Cannabis Use and Outcomes: A Prospective Cohort Study

(620) Childhood outcomes of multiples prenatally exposed to progesterone for the prevention of preterm birth

(633) Comparisons of three-tiered risk assessment tools for postpartum hemorrhage related morbidity

(652) Opportunities to reduce inadequate treatment of syphilis in pregnancy associated with substance use disorder

(653) Timing of antenatal placenta accreta spectrum diagnosis and impact on clinical outcomes: a multicenter study

(656) Vasa Previa Management: Analysis of Maternal and Neonatal Outcomes Between Inpatient and Outpatient Approaches

(670) Peripartum factors associated with breastfeeding after cesarean birth

(678) Impact of body mass index and gestational weight-gain on neonatal outcomes in polycystic ovarian syndrome

(681) Mifepristone pretreatment for second trimester induction, to wait or not to wait?

(691) Neonatal outcomes in late preterm premature rupture of the membranes – subpopulation analysis

(699) Inpatient versus outpatient/home initiation of medications for opioid use disorder (MOUD) in pregnancy

(700) Timing of medication for opioid use disorder (MOUD) initiation in pregnancy and outcomes

(712) Mode of delivery in preterm twin pregnancy and long-term cardiovascular morbidity of the offspring

(715) Trends in Tdap and Flu Vaccination in Pregnant People in Relation to the COVID-19 Pandemic

(723) Intrauterine vacuum-induced tamponade versus intrauterine balloon-tamponade for postpartum hemorrhage management

(740) Maternal history of recurrent pregnancy loss and placental related complications

(747) “Low-risk” and “High-risk” Nulliparous Term Singleton Vertex (NTSV) Cesarean Birth Rates Following the ARRIVE Trial

(750) The Effect of the ARRIVE Trial on Nulliparous Term Singleton Vertex (NTSV) Cesarean Birth Rate

(752) Universal use of aspirin prenatally: Benefit to patients at high-risk for preeclampsia

(776) Maternal-Perinatal Outcomes in Pregnancies Exposed to Hydroxyurea

(789) Perinatal Cannabis Use Adversely Impacts Pregnancy and Neonatal Outcomes

(790) Opioid Use in Pregnancy Adversely Affects Perinatal Outcomes

(792) Medium postpartum hemorrhage risk: do multiple medium risk factors increase risk to high?

(794) MRI After Ultrasound Consistent with Accreta Incorrectly Changes Diagnosis to Negative in up to One-Third

(799) Prophylactic Aspirin Treatment for Preeclampsia Prevention in Dichorionic-Diamniotic Twin Pregnancies

(804) Women with one previous preterm delivery or second-trimester loss: history-indicated-cerclage versus ultrasound cervical length screening

(808) Timing of aspirin discontinuation prior to delivery and risk of peripartum bleeding complications

(811) Does risk of postpartum hemorrhage increase in twin pregnancies with birthweights greater than 4000g?

(812) Impact of an increase from class II to III BMI on pregnancy outcomes

(846) Obstetric and neonatal outcomes in clinically diagnosed placental abruption with and without placental histopathological confirmation

(851) Neonatal outcome in late preterm twin gestation: impact of antenatal corticosteroids before 34 weeks

(855) Incidence of Dysphoric Milk Ejection Reflex

(860) Increasing postpartum hemorrhage and blood product transfusion at delivery in the United States, 2016-2020

(866) Zygosity-based Twin Pregnancy Outcomes: Insights from SNP-Based cfDNA Screening

(867) Impact of BMI and Mode of Delivery on Neonatal and Maternal Outcomes of Nulliparas

(868) Impact of the ARRIVE Trial in Nulliparous Individuals with Morbid Obesity: Interrupted Time Series Analysis

(872) Validation and clinical case report in non invasive prenatal testing for all chromosomes

(879) Perinatal outcomes of methamphetamine use in pregnancy in California, 2008-2019

(887) Perinatal outcomes of Small-for-Gestational-Age (SGA) newborns to mothers with and without a Müllerian anomaly

(903) Impact of Pre-Pregnancy Depressive Disorders on Adverse Perinatal Outcomes

(916) Nutrition Pattern and Adverse Pregnancy Outcomes in nulliparous individuals: A cluster analysis

(921) Maternal and Fetal Outcomes Among Pregnant Women with Endometriosis

(923) The July Phenomenon and Postpartum Hemorrhagic Morbidity

(926) Psychological impact of medical termination of pregnancy: secondary analysis of the multicenter randomized trial DILATOP

(929) Low-Dose Aspirin Usage during Pregnancy: A Retrospective Structured Electronic Medical Record Data Study

(930) The Maternal Implications of Congenital Malformations: A Cross-Sectional Study

(940) Predictors of Maternal Morbidity Among Individuals at Low-Risk of Postpartum Hemorrhage

(941) Single Betamethasone Dose for Late Prematurity and Neonatal Morbidity

(944) Physical activity during pregnancy. A step-by-step towards reduced rate of C-sections

(953) Quantitative blood loss and hemorrhage risk in patients taking antepartum SSRI and aspirin

(961) Predictive value of neutrophil-lymphocyte ratio for intraamniotic infection in preterm premature rupture of membranes

(967) The risk for cesarean delivery after prior successful vaginal delivery according to interpregnancy interval

(968) Post-Partum Hemorrhage Morbidity Among Obese versus Non-Obese Individuals

(972) Prolonged Antepartum Admission As An Independent Risk Factor for Perinatal Depression in Patients with PPROM

(980) Prevention of Obstetric Hemorrhage in Moderate and High Risk Patients: Addition of Prophylactic Misoprostol

(982) Maternal and neonatal outcomes associated with route of progesterone administration in frozen embryo transfers

(983) Maternal characteristics associated with delivery versus expectant management when presenting with term decreased fetal movement

(990) The impact of pregnancy, maternal and neonatal complications on breastfeeding at the time of discharge

(994) The effect of addition of intrauterine suction device to treat postpartum hemorrhage on composite morbidity

(1003) Prenatal polycystic ovarian syndrome is associated with an increase in severe maternal morbidity

(1004) Postpartum Discharge Opioid Prescribing in Nulliparous, Term, Singleton, Vertex Pregnancies in Opioid-Naive Birthing People

(1016) Late preterm antenatal steroids in women with gestational diabetes mellitus

(1048) Population Attributable Risk Proportion of Modifiable and Non-modifiable Risk Factors for Stillbirth

(1051) The Burden of Substance Use Associated Stigma in Pregnancy

(1052) Smoking Reduction in Gravid Patients with Substance Use Disorders (SIGS): A Randomized Controlled Trial

(1053) Postpartum visit timing and the effect on visit attendance: A randomized controlled trial

(1058) PROMPT-AID: Predicting obstetric morbidity from postpartum hemorrhage through artificial intelligence

(1064) Risks of hospitalization for cardiovascular disease in the first year after delivery of twin pregnancies

(1068) Pregnancy Outcomes in Severe Early-Onset Fetal Growth Restriction: Results from the Multicenter PERIMETER Study

(1073) Placenta Accreta Spectrum and Endometriosis

(1079) The Impact of Physical Activity During Pregnancy on Peripartum Depression

(1091) The effect of aspirin treatment on obstetric complications in twin gestations in a retrospective cohort

(1099) Placenta accreta spectrum (PAS) diagnosis timing and its effect on maternal and neonatal outcomes

(1101) Physical activity among pregnant inpatients and outpatients and associations with anxiety

(1103) Prenatal Mobile Self-Operated Home Ultrasound Service Impact on Heath Care Resources Utilization

(1105) Neonatal and Maternal Outcomes in Nulliparas According to Prepregnancy Body Mass Index: A Population-Level Analysis

(1111) The Effect of Pregnancy Complications on Quality of Life with Placenta Accreta Spectrum

(1117) SNP-based Prenatal Cell-free DNA Screening in Twin Pregnancies: A New Standard of Care?

(1140) Retroverted Uterus in the First Trimester and Associated Pregnancy Outcomes

(1143) Social determinants of health and stillbirth evaluation

(1158) The placental drainage effect on quantitative blood loss after vaginal delivery in an urban population

(1159) Reducing blood transfusion administration by introducing a structured intravenous iron protocol for maternal postpartum anemia

(1166) Statewide Patterns of Opioid Use Disorder Diagnosis and Treatment in Nulliparous, Term, Singleton, Vertex Pregnancies

(1187) Placental abruption and antepartum hemorrhage delivery hospitalization trends, risk factors, and outcomes