Born without a uterus, breasts usually develop normally, as estrogen and progesterone are mainly secreted by the ovaries, and generally do not affect breast development. Congenital absence of uterus is one of the reproductive organ malformations, which is mainly due to the abnormal development of the middle and tail of the renal tube. The main manifestation is the absence of uterus and vagina, while the development of ovaries is usually normal. Breast development is mainly due to the action of estrogen and progesterone, the source of which is secreted by the ovaries. Estrogen stimulates the proliferation of breast ducts and connective tissues, while progesterone causes further development of lobules and follicles of the mammary glands. The uterus is mainly responsible for gestation and menstruation, and does not normally produce estrogen or progesterone. The main treatment for naturally born without a uterus is surgical treatment, such as uterus transplantation. It is important to seek medical attention, consult a medical professional and follow medical advice for specific treatments.