A LTHOUGH THE MEDIAN AGE OF WOMEN DIAGnosed with breast cancer is 61 years, about 35% of women newly diagnosed with breast cancer are 54 years or younger, and 12%-almost 25 000-are younger than 45 years.1 The majority of women with breast cancer will receive adjuvant therapy including chemotherapy, hormone therapy, or both, which has been documented to improve disease-free and overall survival. Treatment has a number of adverse effects that directly affect short-term and, in some cases, long-term quality of life. For young women of childbearing age, one of the most devastating adverse effects involves the prospect of loss of fertility, and this concern may influence choice of therapy and adherence to a prescribed treatment plan.2 For some women, concern about early menopause is paramount.Chemotherapy agents exert toxicity in the ovary by causing apoptotic oocyte death in primordial follicles, damaging ovarian reserve and interrupting follicle recruitment and maturation.3 Almost all women develop at least temporary chemotherapy-induced amenorrhea. Reports have suggested a wide range of permanent amenorrhea rates following adjuvant chemotherapy, with important variables including age, treatment regimen, and use of tamoxifen. Historically, the risk of permanent amenorrhea in women younger than 40 years with earlystage breast cancer following adjuvant chemotherapy was reported to be about 40%, compared with 76% in older women. 4 Alkylating agents, particularly the combination regimen of oral CMF (cyclophosphamide, methotrexate, and fluorouracil), are associated with the highest risk of ovarian failure, reaching 90% in women older than 40 years. 4 Current chemotherapy regimens generally have less ovarian toxicity, with significantly lower rates of permanent amenorrhea. Although recovery of menses is still closely related to the variables listed above, in one report 85% of women aged 40 years or younger treated with adjuvant anthracycline and taxane-based chemotherapy recovered menses within 1 year, 5 with docetaxel regimens resulting in higher rates of prolonged amenorrhea.