Raised maternal serum inhibin A concentration at 10 to 14 weeks of gestation is associated with pre‐eclampsia

Maternal serum inhibin A and free β human chorionic gonadotrophin (β‐hCG) were measured in 759 chromosomally normal, pregnant women at 10–14 weeks of gestation. There were nine who subsequently developed pre‐eclampsia and in these women the maternal serum inhibin A concentration was significantly higher than in the normotensive controls.