1. Risk of unintended pregnancy among women with systemic lupus erythematosus;Schwarz;Arthritis Rheum,2008
2. Guttmacher I. State policies in brief: sex and STI/HIV. 2009.
3. Efficacy of the simultaneous use of condoms and spermicides;Kestelman;Fam Plann Perspect,1991
4. Prophylactic antibiotics for intrauterine device insertion: a metaanalysis of the randomized controlled trials;Grimes;Contraception,1999
5. Depot medroxyprogesterone acetate contraception in women with medical problems;Frederiksen;J Reprod Med,1996