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Table 2 Comparison of clinical outcomes of Day 5, 6, and 7 blastocyst transfers

From: Is day 7 culture necessary for in vitro fertilization of cryopreserved/warmed human oocytes?

Transfer categoriesNo. of ETPositive β-hCG (%)Clinical pregnancy (%)Ongoing pregnancy (%)No. of embryos transferredImplanted/transferred embryos (%)
Day 5 blast3926 (66.7%)24(61.5%)22 (56.4%)1.10 ± 0.3124/43 (55.8%)
Day 6 blast94 (44.4%)3 (33.3%)3 (33.3%)1.0 ± 0.03/9 (33.3%)
Day 7 blast33 (100%)3 (100%)2 (66.7%)1.33 ± 0.584/4 (100%)
P valueaNA0.40.230.410.600.18
  1. aNo Statistical differences were observed among Days 5, 6 and 7 blastocysts in terms of β-hCG, clinical pregnancy, ongoing pregnancy rates, mean number of embryos transferred and embryo implantation rates