Declaration of interest: Dr Mansour has received support to undertake research, and attend clinical meetings and scientific advisory boards for Bayer Schering Pharma AG. Dr Inki is an employee of Bayer Schering Pharma. Professor Gemzell-Danielsson has been a member of scientific advisory boards for both Bayer Schering Pharma AG and Organon.
Efficacy of natural family planning methods
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