The National Comprehensive Cancer Network (
NCCN), in their breast cancer
guidelines, has issued the following criteria for determining if a woman is likely post-menopausal:
1. At least 60 years old.
2. If less than 60 years old, the woman has stopped menstruating for 12 months or more in the absence of chemotherapy, tamoxifen, toremifene or other hormonal treatment to suppress the ovaries, AND blood levels of FSH (follicle stimulating hormone) and estradiol are in the post-menopausal range.