Contraception
Volume 81, Issue 5 , Pages 414-420, May 2010

Contraceptive efficacy of emergency contraception with levonorgestrel given before or after ovulation

Instituto Chileno de Medicina Reproductiva (ICMER), 8320152, Santiago, Chile

Received 9 November 2009; received in revised form 10 December 2009; accepted 16 December 2009. published online 28 January 2010.

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 This study has been supported by grants 1060252 and FB0807 from Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT) and by grant A 65559 from the World Health Organization, Department of Reproductive Health and Research (WHO/RHR).

PII: S0010-7824(09)00541-1

doi:10.1016/j.contraception.2009.12.015

Contraception
Volume 81, Issue 5 , Pages 414-420, May 2010