| Table 4. Clinical pregnancy rate, delivery rate and gestational order according to the number of embryos transferred in fresh autologous IVF/ICSI in 2017 | ||||||||||||
| Number of transferred embryos | Total embryo transfer | Clinical pregnancy | Deliveries | |||||||||
| Number | % | Number | % | Number of deliveries | Delivery rater per embryo transfer (%) | Singleton (n) | Singleton (%) | Twin (n) | Twin (%) | ≥Triplets (n) | ≥Triplets (%) | |
| 1 | 5,881 | 26.9 | 1,481 | 25.2 | 1,070 | 18.2 | 1,044 | 97.6 | 26 | 2.4 | 0 | 0 |
| 2 | 12,798 | 58.6 | 4,902 | 38.3 | 3,615 | 28.3 | 2,845 | 78.7 | 756 | 20.9 | 14 | 0.4 |
| 3 | 2,904 | 13.3 | 1,064 | 36.6 | 749 | 25.8 | 576 | 76.9 | 159 | 21.2 | 14 | 1.9 |
| ≥4 | 253 | 1.2 | 76 | 30.0 | 53 | 20.9 | 44 | 83.0 | 7 | 13.2 | 2 | 3.8 |
| Total | 21,836 | 100 | 7,523 | 34.5 | 5,487 | 25.1 | 4,509 | 82.2 | 948 | 17.3 | 30 | 0.5 |