Ovarian failure leading to infertility can be caused by improper prenatal development of the fetal gonad or disruption of the complex postnatal process of folliculogenesis due to alterations in intragonadal or extragonadal regulation. It is critical to have physiological models that mimic events occurring during human development to understand, treat, and prevent ovarian failure in women. Many workers have chosen the mouse as the mammalian model with which to study ovarian function. This review summarizes several key events in female gonadogenesis and folliculogenesis in mice with specific emphasis on spontaneous or induced mutations yielding mouse models that have female infertility owing to ovarian failure.