1. Breastfeeding and contraception;American Academy of Pediatrics;Pediatrics,1981
2. Centers for Disease Control: Surgical sterilization surveillance: Tubal sterilization, 1976–1978, March 1981
3. Combination oral contraceptive use and the risk of endometrial cancer;Centers for Disease Control/NIH;JAMA,1987
4. Oral contraceptives: The benefits and the cardiovascular risks;Connell;Postgrad Med,1987
5. The relationship of tubal infertility to barrier method and oral contraceptive use;Cramer;JAMA,1987