| Table 5. Perinatal outcome according to gestational order of 73,857 babies born due to IVF/ICSI cycles performed between 1998 and 2008 | ||
| Gestational Order | Perinatal mortality | RR (95%IC) |
|---|---|---|
| single | 0.86% | 1 |
| twin | 2.92% | 3.05 (2.69-3.45) |
| triplets | 6.49% | 6.79 (5.94-7.76) |
| ≥quadruplets | 19.29% | 20.19 (17.02-23.95) |