Allopregnanolone, (3alpha-hydroxy-5alpha-pregnan-20-ol), is a neuroactive steroid secreted by the mammalian ovary and adrenal, exerts its anesthetic, anxiolytic, and sedative/hypnotic effects through potentiation of GABA(A) receptors and its release is stimulated by trophic hormones in relation to stress and reproductive hormone secretion. Immunogen: Allopregnanolone-BSA conjugated