| Table 1. Perinatal mortality according to gestational order from 1990 to 2018. | |||
| Singleton | Twins | ≥ Triplets | |
| Livebirtha | 144,637 | 79,755 | 13,562 |
| Stillbirth | 1168 | 1128 | 477 |
| Early neonatal death | 704 | 1058 | 516 |
| Perinatal Mortalityb | 12.8‰ | 26.7‰ | 68.2‰ |
(a) Early neonatal death are excluded
(b) Perinatal Mortality = (stillbirth + early neonatal death) / (livebirth + stillbirth + early neonatal death)