求人不如求己,搜到点东西 http://www.cancer.gov/cancertopics/factsheet/Risk/oral-contraceptives
Oral Contraceptives and Cancer Risk: Questions and Answers
Key Points
* Some cancers depend on naturally occurring sex hormones for their
development and growth. Researchers are interested in learning whether the
hormones in oral contraceptives affect cancer risk in women (see Question 1).
* Some studies have shown an increased risk of breast cancer in women
taking oral contraceptives, while other studies