Endometriosis is a chronic gynecologic disorder where the endometrial tissue (the tissue that lines the uterus) begins growing outside of the uterus. Often, this causes painful and heavy periods , bloating, and can be a cause of deep dyspareunia . Deep dyspareunia is pain during sex with deep penetration. Some women have reported deep dyspareunia with specific positions, which makes sense because the penis can affect the position of the uterus from different angles. For exa