Table 47Cochrane reviews, timing of transfer

InterventionsNEfficacy
Clinical Pregnancy Ongoing Pregnancy/Live Birth
Relative EffectLower 95% CIUpper 95% CIRelative EffectLower 95% CIUpper 95% CI
Day 2 vs. day 3346
ReferenceDay 21008
Day 310191.261.061.511.070.841.37
10 studies, 3 post-20002 studies, 1 post-2000, n = 1200
Day 3 vs. day 5 (blastocyst)347
ReferenceDay 2/31297
Day 5/61260---1.351.051.74
17 studies, 15 post-20009 studies, all post-2000

From: 3, Results

Cover of Effectiveness of Assisted Reproductive Technology
Effectiveness of Assisted Reproductive Technology.
Evidence Reports/Technology Assessments, No. 167.
Myers ER, McCrory DC, Mills AA, et al.

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