March 24, 2026 · BJOG : an international journal of obstetrics and gynaecology · DOI: 10.1111/1471-0528.70223

Prenatal 17-Alpha-Hydroxyprogesterone Caproate Exposure in Twins and Childhood Outcomes: 14-Year Follow-Up of a Randomised Trial

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The authors aimed to evaluate the long-term effects of prenatal exposure to 17-alpha-hydroxyprogesterone caproate (17-OHPC) compared to placebo on childhood outcomes in twins, specifically assessing aspects such as mortality, educational attainment, cognition, and behavior. The study followed children from the AMPHIA trial up to 14 years of age and found no significant differences in these outcomes between the two groups. Overall, the findings suggest that 17-OHPC exposure during pregnancy does not have a meaningful impact on child development or health in this population.

Emilie V J van Limburg Stirum, Marjon A de Boer, A C J Ravelli, Rik van Eekelen, Aleid G Leemhuis, Martijn J J Finken, Cornelieke S H Aarnoudse-Moens, Anneloes L van Baar, Noor E Simons, Rebecca C Painter, Arianne C Lim, Ben W Mol, Eva Pajkrt, Martijn A Oudijk, Janneke van 't Hooft

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