The present invention provides methods, kits, compositions, and devices for detecting Anti-Mullerian hormone (AMH) in whole blood samples. In certain embodiments, the methods, kits, compositions, and devices employ immunoassays that generate a colorimetric or fluorescent signal (e.g., using antibodies conjugated to gold nanoparticles or fluorescent particles) where the signal generated is proportional to the approximate concentration of AMH in a whole blood sample. In particular embodiments, the present invention provides quantitative or semi-quantitative lateral flow immunoassay devices and kits for detecting AMH at home (e.g., in order for women to estimate their ovarian age or diagnose polycystic ovarian syndrome).