Utero‐Tubal Sperm Transport and Its Impairment in Endometriosis and Adenomyosis

: The uterus is composed of different smooth muscle layers that serve various functions. First, menstrual debris is expulsed at the time of the menses. Second, sperm is transported in the preovulatory phase to maximize fertility, and third, the human embryo is placed in an adequate setting during implantation. Endometriosis is a gynecologic disorder leading to severe pain symptoms such as severe pain during menstruation (dysmenorrhea), chronic...