The absence of ovaries may be due to a congenital developmental abnormality. If a woman does not have menstruation after puberty, or if an ultrasound examination reveals the absence of both ovaries. The main reason for this is that the fetus is born without a uterus, or without ovaries at the same time, due to the influence of harmful factors during the critical period of embryonic development and genital development. In this case, there is no menstruation after puberty, which is detected in the hospital, and in some cases may be combined with congenital absence of vagina and other malformations. In adulthood, chromosomal tests are performed and appropriate surgical treatment is performed. In some cases, the absence of ovaries may be due to gynecological malignancy and the removal of the uterus and ovaries, resulting in the absence of the uterus and ovaries.