Research

Effectiveness and acceptability of progestogens in combined oral contraceptives – a systematic review

Regina Kulier¹^*, Frans M Helmerhorst², Nandita Maitra³ and A Metin Gülmezoglu⁴

¹ Geneva Foundation for Medical Education and Research, Geneva, Switzerland

² Leiden University Medical Center, Leiden, Netherlands

³ Medical College Surat, Baroda, India

⁴ UNDP/UNFPA/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction, WHO Geneva, Switzerland

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Reproductive Health 2004, 1:1 doi:10.1186/1742-4755-1-1

Published: 3 June 2004

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