Women can only get pregnant while ovulating. The doctor tells May that she is not ovulating and therefore unlikely to conceive. Ovarian cancer is related to the amount of time spent ovulating. The females begin ovulating as soon as four to six years old. However, by contradiction, some spontaneously ovulating species can occasionally undergo mating-induced preovulatory LH surges. Sows usually begin ovulating in their second year, though some exceptionally begin at nine months. Ovulating women are also seen as a threat. She starts ovulating then, and Sadako's DNA is planted in Mai's eggs. Silver tells him she'll do her part when she's ovulating.