Obstetrics & Gynecology

Adverse pregnancy outcomes linked to higher long-term risk of nontraumatic subarachnoid hemorrhage.

In 1,785,088 primiparous Swedish women followed up to 50 years, APOs were associated with higher risk of SAH (5751 events total). Strongest adjusted associations occurred after placental abruption (HR 1.62) and hypertensive disorders of pregnancy (HR 1.58). Risks were greatest in the early years after delivery and attenuated over time. Sibling analyses suggested associations were not fully explained by shared familial factors, supporting a possible pregnancy-related vascular vulnerability. 1

GDM subtypes show distinct metabolic profiles, with combined defects carrying highest complication rates.

In a 1:1 case-control cohort (330 GDM vs 330 controls), GDM subtypes were defined by HOMA-IR and HOMA-β and compared for outcomes. The combined defect subtype (GDM-M, 17.9%) had the worst glycemia, highest insulin use, and highest rates of cesarean delivery and neonatal complications. Multivariable analysis found GDM-M conferred markedly higher odds of adverse outcomes (OR 8.42 versus reference). Authors suggest intensified monitoring and earlier treatment for GDM-M, but findings are single-center and observational and require external validation. 2

Nonlinear gonadotropin–CLBR relationship in older PCOS patients with a plateau near 1,600 IU.

Retrospective cohort of PCOS patients showed advanced-age (≥35 years) CLBR was lower (44.4%) than in younger patients. In the advanced-age subgroup, total Gn dose had a non-linear association with CLBR with a saturation threshold at ~1,600 IU. Below 1,600 IU each additional 100 IU increased odds of live birth (aOR 1.059); above that dose no benefit was seen. Endometrial thickness correlated positively with CLBR, and authors advise moderate stimulation and EMT optimization while noting possible confounding by indication. 3