Publications by authors named "Yinka Oyelese"

Objective: To evaluate the prenatal detection of vasa previa (VP) and perinatal survival in studies that implemented standardized protocols of prospective second-trimester ultrasound screening protocols followed by ultrasound confirmation in the third trimester.

Data Sources: PubMed/MEDLINE, Web of Science, EMBASE, Global Health, and Global Index Medicus were searched from inception to February 16, 2024.

Study Eligibility: We included cohort studies that implemented standardized second-trimester ultrasound protocols - either universal or targeted - for VP screening, with third-trimester ultrasound confirmation and verification at delivery, over at least one year.

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Language, both spoken and written, plays a critical role in shaping clinical communication, documentation, research integrity, and patient trust. In obstetric care, terminology must align with biological reality, uphold clinical accuracy, respect patient identity, and increasingly, comply with federal policy. As of January 2025, Executive Order 14,168 reframes gender-inclusive language as a threat to women's dignity, safety, and well-being, asserting that "efforts to eradicate the biological reality of sex fundamentally attack women" and it mandates sex-based language, reversing prior encouragement of gender-inclusive terminology.

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Introduction: Intertwin membrane cord insertion (IMCI) is a rare variation of velamentous cord insertion (VCI) that can be seen in dichorionic twin pregnancies. This condition exposes fetal vessels to risks such as compression and rupture, which can lead to complications including fetal growth restriction (FGR) and preterm delivery.

Clinical Presentation: A 30-year-old woman, gravida 1 para 0, was referred at 19+5 weeks for evaluation of a dichorionic diamniotic twin pregnancy due to an abdominal cyst in Twin A, transposition of the great arteries in Twin B, and suspected abnormal cord insertions.

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Obstetric hemorrhage is the leading cause of maternal death in childbirth; it is estimated that one woman dies every four minutes from postpartum hemorrhage (PPH). PPH is the cause of approximately one-quarter of maternal deaths worldwide and is thus a major public health issue of great importance. Despite modern advances in medicine, hemorrhage continues to lead the causes of pregnancy-related death in most countries, with increasing disparity between countries with highly developed and underdeveloped national healthcare systems.

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Preterm birth (PTB) can result from spontaneous preterm labor (spontaneous PTB, SPTB) or as an intervention by obstetricians where the baby is deliberately delivered preterm (Indicated PTB, IPTB) to get them to neonatal intensive care. The impact of these PTB subtypes on ASD risk is unclear. Therefore, we compared the risk of ASD diagnosis for children born from pregnancies that ended in SPTB or IPTB with those born at term.

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Objectives: The aim of this systematic review and meta-analysis was to describe the perinatal outcomes and modifiers of antenatally diagnosed cystic hygroma (CH).

Data Sources: The PubMed, Embase and Web of Science Core Collection databases were searched from inception until March 18, 2024.

Study Eligibility Criteria: Full-text English-language observational cohort studies reporting any pregnancy and postnatal outcomes for fetuses with a CH diagnosed on prenatal ultrasound were included in this study.

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Placental abruption has classically been defined as the premature separation of a normally located placenta before delivery of the fetus. Traditionally, this diagnosis was based on clinical symptoms, including vaginal bleeding, pain, and fetal distress. This definition, however, preceded the advent of obstetric ultrasound.

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Vasa previa is an uncommon, potentially life-threatening condition where fetal vessels traverse the membranes over the cervix without Wharton jelly protection, risking fetal exsanguination if undiagnosed. Prenatal ultrasound and planned preterm cesarean reduce perinatal mortality to under 1%, though concerns about prematurity persist. Fetoscopic laser photocoagulation, initially used for twin-twin transfusion syndrome, shows promise in select cases, potentially allowing vaginal delivery at term.

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Postpartum Depression (PPD) is a common adverse pregnancy outcome, but the extent to which PPD correlates with attention deficit hyperactivity disorder (ADHD) in the offspring is unclear. Therefore, we examined if children of mothers who experienced PPD are at risk for developing ADHD and how this association may be modified by the child's sex, race/ethnicity, and gestational age at delivery. A retrospective cohort study of singleton-born children aged 3-12 years and delivered in Kaiser Permanente Southern California hospitals between 01/01/2010-12/31/2019 (n = 229,860) was performed using electronic health records.

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Objectives: The aim of our study was to describe outcomes of fetuses with cystic hygromas (CH) based on results of non-invasive prenatal testing (NIPT), nuchal translucency (NT) size, and spontaneous hygroma regression.

Methods: This was a retrospective cohort study of all patients with a CH diagnosed on first trimester ultrasound at our institution over a 9-year period. The primary outcomes were pathogenic genetic abnormalities, structural malformations and perinatal loss.

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In pregnancies with vasa previa, prenatal diagnosis and pre-labor cesarean delivery are associated with significantly improved perinatal outcomes compared to undetected cases. However, a universally accepted ultrasonographic definition of vasa previa is lacking. Specifically, the distance from the cervical internal os beyond which vaginal delivery can be safely recommended remains to be determined.

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Introduction: Vasa previa is a complication of pregnancy, which affects approximately 1:1200 pregnancies, and when undiagnosed prenatally, it can be associated with significant perinatal mortality. This condition is thought to be a sporadic entity without known genetic or familial associations and thus considered to carry a negligible recurrence risk.

Key Findings: We present a case of a 42-year-old gravida 3 para 2 diagnosed on transvaginal ultrasound with a vasa previa at 34 weeks associated with vaginal bleeding, which required an urgent caesarean in a prior spontaneous pregnancy.

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Despite its critical importance, the placenta receives substantially less attention during obstetric ultrasound examinations compared to the fetus. The evaluation of the placenta is typically limited to determining its location within the uterus, particularly its relationship to the cervix. Abnormal placenta findings are the result of gross anomalies identified by chance during obstetric examinations, rather than from a systematic evaluation.

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Article Synopsis
  • Vasa previa (VP) is a serious complication where fetal blood vessels are vulnerable near the cervix, requiring cesarean delivery before labor to avoid severe risks.
  • Different obstetric organizations have varying guidelines on managing VP, especially regarding hospitalization, steroid use, and delivery timing for asymptomatic patients.
  • Current guidelines lack robustness, relying on low-quality evidence and not incorporating new research insights, highlighting the need for more substantial evidence for improved management strategies.
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  • Placenta previa is a significant cause of bleeding during pregnancy and used to be a major cause of maternal deaths, but advancements in care have improved outcomes.
  • It is usually detected during routine ultrasounds in the second trimester, and most cases resolve before the due date.
  • Key risk factors include previous cesarean deliveries, older age, and smoking, and if the condition persists late in pregnancy, a cesarean delivery is advised.
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Article Synopsis
  • The symposium presents a series of reviews focused on important clinical aspects of the placenta and umbilical cord, covering conditions like placenta previa and abruption, as well as various pathologies and infections.
  • It highlights the critical functions of the umbilical cord as a lifeline for the fetus, discussing how its dysfunction can lead to complications such as vasa previa.
  • This collection emphasizes the significance of understanding these structures for ensuring maternal-fetal health throughout pregnancy.
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Article Synopsis
  • Postpartum depression (PPD) is a serious condition impacting both mothers and children, making it essential to study trends and risk factors related to its prevalence.
  • A recent study analyzed over 442,000 pregnancies from Kaiser Permanente Southern California between 2010 and 2021, examining the relationship between PPD and factors like race, ethnicity, and prepregnancy body mass index (BMI).
  • Results showed that PPD rates doubled from 9.4% in 2010 to 19.0% in 2021, with the highest increases among Asian/Pacific Islander and non-Hispanic Black populations, and worsening rates were particularly noted in individuals with obesity.
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"" This maxim underscores the importance of historical awareness in medicine, particularly for obstetricians and gynecologists (ObGyns). ObGyns significantly impact societal health through their care for pregnant women, fetuses, and newborns, uniquely positioning them to advocate for health initiatives with lasting societal benefits. Despite its importance, the history of medicine is underrepresented in medical curricula, missing opportunities to foster critical thinking and ethical decision-making.

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Objectives: To estimate the number of pregnancies complicated by vasa previa annually in nine developed countries, and the potential preventable stillbirths associated with undiagnosed cases. We also assessed the potential impact of universal screening for vasa previa on reducing stillbirth rates.

Methods: We utilized nationally-reported birth and stillbirth data from public databases in the United States, United Kingdom, Canada, Germany, Ireland, Greece, Sweden, Portugal, and Australia.

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Vasa previa is a condition where unprotected fetal vessels cross the cervix within the membranes, posing a considerable risk of fetal death or severe morbidity if the membranes rupture before or during delivery. There has not been a definitive treatment for this condition. Patients are typically closely monitored and hospitalized in the early third trimester and scheduled for cesarean delivery before term.

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Article Synopsis
  • Nicolaides-Baraitser syndrome (NCBRS) is a rare genetic condition leading to severe intellectual disabilities and other physical symptoms, diagnosed through clinical signs and the presence of a SMARCA2 mutation.
  • The case presented involves a prenatal diagnosis of caudal regression and congenital vertical talus, ultimately linked to a de novo SMARCA2 variant after the pregnancy was terminated.
  • This study suggests that these specific physical traits should be recognized as part of the spectrum associated with NCBRS when linked to the SMARCA2 pathogenic variant.
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