30-Second Takeaway
- Oocyte donation pregnancies have roughly 2–3-fold higher hypertensive complication and preeclampsia risk than autologous or spontaneous conceptions.
- Routine 36-week ultrasound EFW can guide LGA induction at 38–39 weeks to keep cesarean risk similar to spontaneous 40-week birth.
- In gestational diabetes, lower gestational weight gain—often including modest weight loss for overweight/obesity—is associated with fewer adverse perinatal outcomes.
Week ending April 4, 2026
Hypertensive risk in oocyte donation, delivery timing for LGA, and new data on GDM weight gain, cervical surveillance, and maternal mortality
Oocyte donation substantially increases hypertensive complication risk versus autologous pregnancies
This IPD meta-analysis pooled 16 cohorts, including 2,747 oocyte donation, 4,699 IVF/ICSI, and 33,323 naturally conceived pregnancies beyond 20 weeks. After adjustment for age, parity, and multiples, oocyte donation pregnancies had about 2.6–2.9-fold higher odds of any hypertensive complication versus autologous pregnancies. Adjusted odds of preeclampsia were similarly elevated, around 2.3-fold, with high-certainty evidence and minimal heterogeneity for this outcome. Elevated risks persisted when comparing oocyte donation separately with naturally conceived and IVF/ICSI pregnancies, indicating assisted reproduction alone does not explain the excess risk.
36-week LGA scan supports earlier induction to limit cesarean risk
This analysis of 84,397 pregnancies evaluated labor outcomes by 35–36-week estimated fetal weight and timing and type of labor onset. Among 7,695 LGA fetuses (EFW >90th percentile), cesarean risk for fetal compromise or failure to progress rose progressively with gestational age, steeply after 40 weeks. At any gestational age, cesarean hazard was higher in nulliparas and in induced versus spontaneous labors, and increased as EFW rose from 90th to >95th percentile. Modeling suggested induction at 38 weeks for EFW >95th percentile and at 39 weeks for EFW 90–95th percentile yields cesarean risk similar to spontaneous labor at 40 weeks.
BMI-specific gestational weight gain targets in GDM favor lower gain and even weight loss in obesity
This retrospective study used US natality data from over 1.3 million pregnancies with gestational diabetes between 2015 and 2020, plus a 2021 validation cohort. A composite adverse outcome included hypertensive disorders, primary cesarean, maternal transfusion or ICU, preterm birth, size-for-gestational-age extremes, and NICU admission. Estimated optimal gestational weight gain ranges were underweight 12–<20 kg, normal weight 8–<16 kg, and overweight from weight loss to <14 kg. For class 1 obesity, optimal gain ranged from weight loss to <10 kg, and for class 2–3 obesity from weight loss to <8 kg.
References
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Additional Reads
Optional additional studies from this edition.