1. Ovulation following therapeutic abortion;Boyd;Am J Obstet Gynecol,1972
2. Return of ovarian function after abortion;Lahteenmaki;Clin Endocrinol,1978
3. Sexual behavior during the first eight weeks after legal termination of pregnancy;Boesen;Acta Obstet Gynecol Scand,2004
4. Health worker roles in providing safe abortion care and post-abortion contraception,2015
5. Family planning: a global handbook for providers: evidence-based guidance developed through worldwide collaboration: Johns Hopkins Ccp-Info;World Health Organization,2007