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. 2016 Nov 17;31(12):2714–2722. doi: 10.1093/humrep/dew227

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© The Author 2016. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Reported live birth outcomes in 47 IVF RCTs in 2013–2014 by stage of intervention. Each row corresponds to a single study. Only studies reporting live birth outcome measures appearing in more than one study are shown (as opposed to all studies reporting live birth). Blue triangles () indicate that the study authors used a denominator that coincided with the point of randomisation in the trial. Red circles () indicate that the study authors did not use the point of randomisation as the denominator, but instead included only patients who reached a certain stage of treatment when calculating live birth rates, potentially undermining the random allocation in the study. Black squircles () indicate that it is unclear whether or not the denominator coincided with the point of randomisation.

¹Authors presented this as a descriptive result.

Inline graphic — Reported live birth outcomes in 47 IVF RCTs in 2013–2014 by stage of intervention. Each row corresponds to a single study. Only studies reporting live birth outcome measures appearing in more than one study are shown (as opposed to all studies reporting live birth). Blue triangles () indicate that the study authors used a denominator that coincided with the point of randomisation in the trial. Red circles () indicate that the study authors did not use the point of randomisation as the denominator, but instead included only patients who reached a certain stage of treatment when calculating live birth rates, potentially undermining the random allocation in the study. Black squircles () indicate that it is unclear whether or not the denominator coincided with the point of randomisation.

¹Authors presented this as a descriptive result.