Drife J, Guillebaud J
Br J Hosp Med. 1986 Jan;35(1):25-9.
The natural menstrual cycle can influence the development of some cancers. Combined oral contraceptives, which replace normal hormonal fluctuations with steadier levels of artificial sex hormones, appear to protect against cancers of the endometrium and ovary, but their effect on carcinomas of the breast and cervix remains uncertain.
自然月经周期会影响某些癌症的发展。复方口服避孕药用更稳定水平的人工性激素取代了正常的激素波动,似乎能预防子宫内膜癌和卵巢癌,但其对乳腺癌和宫颈癌的影响仍不确定。