Sex and estrogen have a certain relationship, from puberty to the end of reproductive age, the ovary cycle secretion of estrogen and progesterone, so the vaginal secretion, cervical secretion will be more, and there are a lot of folds in the vagina to make the vaginal elasticity is very good, the vagina does not appear dry when having sex, and estrogen has a lot to do with. After menopause, with the decline of ovarian function, the body of estrogen decline, the frequency of sexual life will obviously decline and the vaginal mucosa will also become relatively thin. When having sex, the vaginal mucosa will become relatively thin, and the vaginal secretion will be reduced, so the vagina will feel dry, so sex has a certain relationship with estrogen.