Why does endometrium enter the myometrium and how to prevent adenomyosis In fact, the source of ectopic endometrium in endometriosis has not been elucidated so far, which means that the etiology is currently unclear. However, several theories of etiology are summarized in Obstetrics and Gynecology published by People’s Health Press in 2018. 1, implantation theory, implantation theory includes “the theory of blood flow reversal”, “lymphatic and venous dissemination”, “medical implantation”, 2, the theory of epithelial metaplasia of the body cavity, 3, the theory of induction. There are also genetic factors, immune and verification factors, and even local microenvironmental factors. (For those of you who are not medical students, these theories may be obscure and difficult to understand, so I won’t go into details here. Summing up my clinical experience over the years, I agree with the medical implantation theory, which means that too many uterine operations, such as curettage, abortion, and planarian delivery…these operations will injure and destroy the original intact uterine lining, which will lead to This can cause the normal endometrium to slip out and run into the muscular layer, forming adenomyosis, and into the ovaries, forming coeliacs. And I have found that most of the patients I do uterine preservation surgery on will have a history of abortion and planarian delivery or other surgeries. Therefore, the direct way to prevent adenomyosis is to protect the uterus, not to let it be easily hurt, to use reasonable contraception, to reduce the chances of abortion or induction of labor, not to have intercourse during and just after menstruation, and to pay attention to keeping warm during menstruation, to eat less spicy and stimulating food, etc. Then someone will ask again and say, “Doctor, I know that there are 18. 19 year old girls who suffer from this disease, They have never even had a boyfriend, let alone any surgery, how can they also suffer from adenomyosis?” In this type of patient, I think it is caused by the backward movement of the uterus and the poor discharge of menstrual blood. Since menstrual blood contains a lot of endometrial tissue, they stay in the uterus for a long time. If dysmenorrhea causes spasmodic contraction of the myometrium and increased pressure in the uterus, the endometrium may become ectopic with the myometrium. Adenomyosis is also associated with progesterone abnormalities, obstruction of the reproductive tract, and genetic factors. Although it is still not possible to determine exactly which factor causes adenomyosis, it is possible to manage your daily life, work and rest habits, and have regular health checkups…all of which you should be able to do.