['To investigate whether inhibin A, inhibin B, and activin A serum levels are altered in women with preeclampsia.', 'Serum samples of 20 women with preeclampsia (study group) and 20 normotensive pregnant women, matched for maternal and gestational age and parity, were assayed for inhibin A, inhibin B and activin A by specific enzyme-linked immunosorbent assay.', 'Median serum concentrations of inhibin A and activin A were significantly higher among women with preeclampsia than in women with normotensive pregnancies, while inhibin B levels were comparable in both groups. Activin A levels were positively correlated with those of inhibins A and B, and inhibin A levels were positively correlated with diastolic blood pressure and inhibin B concentration in the study group.'] Are serum levels of inhibin B , unlike inhibin A and activin A , altered in women with preeclampsia?