Scientists Identify Brain Circuit for Female Sexual Rejection

Researchers have discovered that progesterone-responsive neurons in the anterior ventromedial hypothalamus (VMH) of female mice toggle between sexual receptivity and rejection based on fertility. These neurons are active during rejection behaviors outside the fertile phase and receive inhibitory signals during fertility, reducing their activity and allowing mating. Using optogenetics, the study confirmed these neurons act as a neural switch for rejection, offering insights into human sexual behavior and related disorders.