| Supplementary Table 2. Clinical pregnancy rate, delivery rate and gestational order according to the number of embryos transferred in FET 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 | 8,755 | 38.1 | 3,000 | 34.3 | 2,229 | 25.5 | 2,195 | 98.5 | 34 | 1.5 | 0 | 0.0 |
| 2 | 12,268 | 53.4 | 4,968 | 40.5 | 3,775 | 30.8 | 2,883 | 76.4 | 873 | 23.1 | 19 | 0.5 |
| 3 | 1,872 | 8.1 | 702 | 37.5 | 518 | 27.7 | 361 | 69.7 | 138 | 26.6 | 19 | 3.7 |
| ≥4 | 90 | 0.4 | 26 | 28.9 | 17 | 18.9 | 11 | 64.7 | 5 | 29.4 | 1 | 5.9 |
| Total | 22,985 | 100.0 | 8,696 | 37.8 | 6,539 | 28.4 | 5,450 | 83.3 | 1050 | 16.1 | 39 | 0.6 |