Reference ranges of anti‐Müllerian hormone and interaction with placental biomarkers in early pregnancy: the Generation R Study, a population-based prospective cohort study

OBJECTIVE: The primary objective of this study is to establish maternal reference values of anti‐Müllerian hormone (AMH) in a fertile multi-ethnic urban pregnant population and to evaluate the effect of gestational age. The secondary objective of this study is to explore the association between AMH and placental biomarkers. DESIGN: This study was embedded in the Generation R Study, an ongoing population-based prospective cohort study from early pregnancy onwards. SETTING: City of Rotterdam, the Netherlands, out of hospital setting. PATIENTS: In 5806 women, serum AMH levels were determined in early pregnancy (median 13.5 weeks; 95% range 10.5–17.2). INTERVENTION(S): None. MAIN OUTCOME MEASURES: Maternal AMH levels in early pregnancy and its association with placental biomarkers, including human chorionic gonadotrophin (hCG), soluble fms-like tyrosine kinase-1 (sFLT), and placental growth factor (PLGF). RESULTS: A nomogram of AMH in early pregnancy was developed. Serum AMH levels showed a decline with advancing gestational age. Higher AMH levels were associated with a higher level of the placental biomarkers hCG and sFLT in early pregnancy. This last association was predominantly mediated by hCG. AMH levels were negatively associated with PLGF levels. CONCLUSION: In this large study, we show that AMH levels in early pregnancy decrease with advancing gestational age. The association between AMH and the placental biomarkers hCG, sFLT, and PLGF suggests a better placental development with lower vascular resistance in mothers with higher AMH levels. Hence, AMH might be useful in predicting adverse pregnancy outcomes due to impaired placental development.