Table 1.
Pregnancy rate per transfer (%) | Twinning rate per transfer (%) | Live birth rate per twin pregnancy (%) | |
Intract-embryos | 14/57 (25) | 14/70 (20) | 18/28 (64) |
Demi-embryos | 12/55 (27) | 1/12 (8) | 0/2 (0) |
The pregnancy rate was determined from transfers involving only two embryos. The twinning rate was based on all pregnancies (2 or more embryos/transfer) in the intact embryo group, hence the number of pregnancies is larger.