| Table 1. Characteristics of cycles analyzed, IVF/ICSI 2012-2013 | |||
| eDET | TET | p-value | |
| Number of transfer cycles | 11002 | 10634 | |
| Mean age of female partner (SD) | 34.07 (4.09) | 37.32 (4.21) | < 0.001 |
| Proportion of blastocyst-stage transfer | 30.96% | 11.49% | < 0.001 |
| Delivery rate per embryo transfer | 40.24% | 26.98% | < 0.001 |
| Deliveries (n) | 4427 | 2869 | < 0.001 |
| Singletons (%) | 73.68 | 77.10 | |
| Twins (%) | 25.80 | 20.56 | |
| ≥ Triplets (%) | 0.52 | 2.34 | |
| All newborns | |||
| mean weight g (SD) | 2698 (666) | 2645 (655) | 0.0024 |
| mean gestational age WA (SD) | 36.9 (2.7) | 36.8 (2.5) | 0.0019 |
| perinatal mortality ‰ | 36.0 | 45.9 | 0.017 |
| Singletons | |||
| mean weight g (SD) | 3050 (534) | 2968 (502) | < 0.001 |
| mean gestational age WA (SD) | 38 (2.2) | 37 (2.1) | < .001 |
| perinatal mortality ‰ | 31.6 | 36.2 | 0.354 |
| Twins | |||
| mean weight g (SD) | 2265(515) | 2243 (522) | 0.2413 |
| mean gestational age WA (SD) | 35 (2.9) | 35 (2.7) | 0.1501 |
| perinatal mortality ‰ | 41.6 | 53.4 | 0.115 |
| ≥ Triplets | |||
| mean weight g (SD) | 1579 (472) | 1689 (448) | 0.0766 |
| mean gestational age WA (SD) | 32 (2.9) | 33 (3.0) | 0.1814 |
| perinatal mortality ‰ | 60.6 | 102.6 | 0.308 |
| eDET transfer of two embryos and at least one embryos cryopreserved; TET transfer of at least three embryos and no embryo cryopreserved; g = grams; WA = weeks in amenorrhea; SD standard deviation; Perinatal mortality: fetal or neonatal death occurring during late pregnancy (at 20 completed weeks of gestational age and later), during childbirth, or up to 7 completed days after birth. |
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