Antiprogestins.- Progesterone Receptors in Brain and Hypophysis.- Effects of Estrogen and Progesterone as Revealed by Neurophysiological Methods.- Progesterone Receptors in CNS Correlated with Reproductive Behavior.- Estradiol-Progesterone Interactions in the Reproductive Behavior of Female Rats.- Behavioral Effects on Humans of Progesterone-Related Compounds During Development and in the Adult.