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. 2018 Jul 17;4(1):e000387. doi: 10.1136/bmjsem-2018-000387

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© Author(s) (or their employer(s)) 2018. 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 and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

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Flow diagram of participants in the study. IVF, in vitro fertilisation, ICSI intracytoplasmic sperm injection.