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Article History

Received: 5 December 2017

Accepted: 27 July 2018

First Online: 22 August 2018

Ethics approval and consent to participate

: Not applicable.

: Not applicable.

: J.L.M. has received payment for consulting and medical writing services from Bayer AG for this and other work. S.O’B. has received a grant to his institution from Bayer AG for Menstrual Pictogram Research and from Advantage West Midlands for Symptometrics, a company involved in the development of an electronic version of premenstrual syndrome charts, pain charts and an alternative menstrual pictogram. He has received payment from Asarina Pharma for consultancy work and to act as Chief Investigator for an RCT on Premenstrual Syndrome, and from Bayer for consulting services and expert testimony for the licensing of and lectures on OC Yaz. He has also been an unpaid Chairman for the International Society for Premenstrual Disorders (ISPMD) and received payment for intellectual property issues unrelated to the work in this manuscript. C.G. and C.S. are employees of Bayer AG, Berlin, Germany. C.S. holds stock in Bayer AG.

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