1. Abortion surveillance — United States, 2010;Pazol;Morb Mortal Wkly Rep Surveill Summ,2013
2. Abortion surveillance — United States, 2005;Gamble;MMWR Surveill Summ,2008
3. Abortion incidence and service availability in the United States, 2011;Jones;Perspect Sex Reprod Health,2014
4. Contraceptive efficacy;Trussell,2011
5. Forgettable contraception;Grimes;Contraception,2009