The absence of breasts does not usually affect fertility, but, of course, can affect breastfeeding. Breast loss includes congenital breast loss and acquired breast loss. Congenital breast loss is mainly due to the stagnation of the development of the breast ridge at the time of embryo or the influence of certain medications on the development of the breast ridge, and is usually combined with one or more other congenital anomalies, while acquired breast loss is mostly due to trauma or surgery, and is usually not accompanied by other developmental anomalies. Normal fertility requires the following factors: normal sperm, healthy and mature egg cells, open fallopian tubes, a normal sex life and an intrauterine environment suitable for the fertilization and development of the egg. Therefore, either congenital or acquired breast loss requires pre-fertility testing for infertility.