Article info
PDFObstetrics and gynaecology
Research
Typical use effectiveness of Natural Cycles: postmarket surveillance study investigating the impact of previous contraceptive choice on the risk of unintended pregnancy
- Correspondence to Dr Raoul Scherwitzl; raoul.scherwitzl{at}naturalcycles.com
Citation
Typical use effectiveness of Natural Cycles: postmarket surveillance study investigating the impact of previous contraceptive choice on the risk of unintended pregnancy
Publication history
- Received September 6, 2018
- Revised January 14, 2019
- Accepted February 13, 2019
- First published March 23, 2019.
Online issue publication
March 23, 2019
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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.