Breast cancer often occurs in women of childbearing age, many of whom go on to have children. Several studies suggest that pregnancy does not worsen the outcome of breast cancer, and that a history of breast cancer does not affect the outcome of pregnancy. The timing of pregnancy after breast cancer should take into account the risk of recurrence and metastasis. Conservative surgical treatment for cervical cancer may increase the risk of late fetal loss or preterm birth. Candidates for conservative treatment of ovarian and endometrial cancer must be carefully selected, as recurrence during or after pregnancy is not uncommon.