Table 2 Pregnancy rates by day of embryo transfer
From: Pregnancy rates of day 4 and day 5 embryos after culture in an integrated time-lapse incubator
| Â | Day 4 transfers | Day 5 transfers | p-value |
|---|---|---|---|
positive pregnancy test/ embryo transfer | 62/124 (50.0%) | 252/475 (53.1%) | ns (p = 0.547) |
positive pregnancy test/ embryo transfer after transfer of 1 embryo | 3/12 (25.0%) | 30/82 (36.6%) | ns (p = 0.531) |
positive pregnancy test/ embryo transfer after transfer of 2 embryos | 58/110 (52.7%) | 220/387 (56.8%) | ns (p = 0.448) |
positive pregnancy test/ embryo transfer after transfer of 3 embryos | 1/2 (50.0%) | 2/6 (33.3%) | ns (p = 1.0) |
clinical pregnancy/ embryo transfer | 56/124 (45.2%) | 217/475 (45.7%) | ns (p = 1.0) |
clinical pregnancy/ embryo transfer after transfer of 1 embryo | 3/12 (25.0%) | 25/82 (30.5%) | ns (p = 1.0) |
clinical pregnancy/ embryo transfer after transfer of 2 embryos | 52/110 (47.3%) | 190/387 (49.1%) | ns (p = 0.747) |
clinical pregnancy/ embryo transfer after transfer of 3 embryos | 1/2 (50.0%) | 2/6 (33.3%) | ns (p = 1.0) |
ongoing pregnancy/ embryo transfer | 54/124 (43.5%) | 198/475 (41.7%) | ns (p = 0.759) |
ongoing pregnancy/ embryo transfer after transfer of 1 embryo | 3/12 (25.0%) | 21/82 (25.6%) | ns (p = 1.0) |
ongoing pregnancy/ embryo transfer after transfer of 2 embryos | 50/110 (45.5%) | 175/387 (45.2%) | ns (p = 1.0) |
ongoing pregnancy/ embryo transfer after transfer of 3 embryos | 1/2 (50.0%) | 2/6 (33.3%) | ns (p = 1.0) |
multiple pregnancies with > 1 positive heart beat after 6 weeks | 11/124 (8.9%) Twins: N = 11 Triplets: N = 0 | 62/475 (13.1%) Twins: N = 61 Triplets: N = 1 | ns (p = 0.280) |
implantation rate per embryo (no of gestational sacs/no of transferred embryos) | 70/238 (29.4%) | 288/874 (33.0%) | ns (p = 0.310) |