Competing interests
The authors presently consult and in the past have consulted with manufacturers of hormonal products used in reproductive medicine. A detailed conflict of interest declaration for each cosignatory is available online as a data supplement at http://informahealthcare.com/doi/abs/10.3109/0284186X.2013.792637.
Provenance and peer review
This statement has not been subjected to the Journal‘s usual peer review process.
Joint publication
This statement is also published simultaneously in the July 2013 issue of the Journal of Family Planning and Reproductive Health Care (Bitzer J, Amy J-J, Beerthuizen R, et al. J Fam Plann Reprod Health Care Published Online First: 12 April 2013 doi:10.1136/jfprhc-2013-100624).