"barren woman", commonly known as "stone core" among the people. That is, congenital absence of vagina, but with general female sexual characteristics, sexual desire and normal female psychological state. Anatomically speaking, the "barren woman" is mainly due to the deformation and blockage of menstrual passages, so that menstruation does not come or cannot flow out when menstruation comes. "barren woman" can be divided into "external stone" and "internal stone" and "external stone", also known as "false stone", which means that the penis cannot be inserted into the vagina because of the hypertrophy or atresia of the hymen after marriage. This kind of "in vitro barren woman" can be corrected only by hymen incision, and can lead a normal sexual life after operation. "Inner Stone Girl" refers to congenital absence of vagina. This is because the Mullerian ducts that developed into uterus and vagina during the embryonic period did not form cavities. "barren woman" has no vagina, mostly because she has no menstrual cramps after puberty or can't have sex on her wedding night. Pre-marital physical examination can find the "barren woman" in time. By correcting the "reconstructed" vagina, you can have a happy sex life in the future. Some women, although they have no vagina, have a well-developed uterus. After menarche, menstrual blood comes every month, but it can't flow out and accumulates in the uterine cavity. When the uterine cavity is full, menstrual blood flows into the abdominal cavity along the fallopian tube mouth. Due to the stimulation of menstrual blood in the uterus, the uterus appears paroxysmal spasm and contraction, leading to periodic abdominal pain. If the ovary of the vagina can secrete a certain amount of female hormones, the breasts will develop, pubic hair will grow, and women can still have secondary sexual characteristics. Congenital absence of vagina, some absence of uterus or immature uterus. Without the uterus, of course, there would be no endometrium, and there would be no menstruation. In other words, the uterus of unmarried young women is as small and long as that of young girls, and the endometrium is very thin, so there will be no menstruation. Some "infertile women" have vague vagina appearance, but there is a diaphragm in the vagina, or the vagina is partially occluded. Even with the uterus and endometrium, menstruation cannot flow out, let alone sexual intercourse. Hymen atresia is also a kind of "barren woman". Under normal circumstances, the hymen grows at the vaginal opening, which is a thin film with an opening in the middle from which menstrual blood or vaginal secretions flow. If the development is abnormal and the hymen has no opening, it is called hymen atresia or hymen atresia. Most of these women have normal uterus and vagina development, but due to hymen atresia, menstrual blood does not come out during menstrual cramps. At first menstrual blood accumulates in vagina, and then menstrual blood accumulates in uterus and fallopian tubes. Its symptoms and manifestations are the same as menstrual blood retention caused by absence of vagina, and there are also abdominal pain and mass. Gynecological examination, you can see that the hymen protrudes outward and is purple, which is caused by hematocele.