It is possible to treat endometriosis after pregnancy. Endometriosis is a condition in which endometrial tissue grows outside the uterine cavity and myometrium. Patients with endometriosis may be able to heal themselves after pregnancy if the ectopic lesions are small. This is because after pregnancy, the patient’s ovarian function will no longer experience cyclical fluctuations in hormones. In addition, endometriosis to the myometrium, interstitium of the ovaries, glands, etc., will not be prone to exfoliation, bleeding, and cyclic hyperplasia. This will inhibit the ectopic endometrium and reduce the development of endometriosis. As a result, it is possible that the ectopic lesions will heal after the pregnancy and birth. It is recommended that patients with endometriosis who are planning to become pregnant do so in a timely manner.