To make the “fake” realistic, you cannot leave the original position. So, to create space in situ, and at the same time to shorten the treatment time, it is necessary to find a new “lining”. As an obstetrician and gynecologist, the amniotic sac is the easiest one to think of, because it is a biological membrane, it is easy to obtain, it is theoretically easy to survive, the “vaginal” mucosa is closer to its natural state, and the vaginal secretions are odorless. We call it “amniotic vagina”. The first step is to create a large enough space in situ, and the second step is to apply the “lining”, which is also minimally invasive. The key is whether the membrane survives as expected. Theoretically, the membrane is easy to survive, but in practice the survival rate is not high. Liu Dongguang, Department of Gynecology, Jining First People’s Hospital To solve the problem of “lining” survival, gynecologists borrowed the surgical method of skin implantation and used the patient’s own inner thigh skin or buttock skin as “lining”, which effectively solved the problem of “lining” survival. Although the problem of survival of the “lining” was effectively solved, it was found that the vagina with the skin as “lining” was dry. This procedure is a bit more complicated, as the in situ space is passed through the abdominal cavity, then the pelvic peritoneum is freed, the freed pelvic peritoneum is “lined” on the surface of this space, and finally the top of this space is closed. We call this a pelvic peritoneal vaginal substitute, which is obviously more invasive, but the postoperative survival rate of the “lining” is better than that of the amniotic membrane, and its “realism” is better than that of the amniotic membrane. However, not everyone’s pelvic cavity is the same, and it is difficult to achieve the desired effect when the pelvic peritoneum is not free enough to be “lined” on the inner surface of the space; also, for those who need to operate again after the first failed operation, the “lining” needs to be chosen more carefully. How does the gynecologist solve the “lining” problem? To know more details to be elaborated below.