Table 4 Perinatal outcome by the three data sources, Finland 1996–1998, %1)
From: Monitoring of IVF birth outcomes in Finland: a data quality study
MBR | IVF statistics | IVF research data | |
|---|---|---|---|
Births | 3535 | 3557 | 3594 |
- singletons | 2735 | 2765 | 2819 |
- multiples | 800 | 792 | 775 |
Premature births (< 37 weeks), N | 582 | 623 | 634 |
% | 16.5 | 17.5 | 17.6 |
- among singletons | 8.7 | 8.5 | 9.4 |
- among multiples | 43.1 | 49.0 | 47.7 |
Newborns | 4331 | 4383 | 4384 |
- singletons | 2735 | 2765 | 2819 |
- multiples | 1596 | 1618 | 1565 |
Low birth weight (< 2500 grams), N | 836 | 906 | 856 |
% | 19.3 | 20.7 | 19.5 |
- among singletons | 6.0 | 5.9 | 6.4 |
- among multiples | 42.2 | 46.2 | 43.1 |
Small-for-gestational age, N | n.a. | 301 | 305 |
% | n.a. | 6.9 | 7.0 |
- among singletons | n.a. | 2.4 | 3.1 |
- among multiples | n.a. | 15.4 | 14.4 |
Birth weight, g | |||
Mean (SD) | n.a. | 3085 (787) | 3090 (781) |
- among singletons | n.a. | 3440 (625) | 3421 (644) |
- among multiples | n.a. | 2475 (650) | 2494 (640) |
Perinatal mortality, N | 61 | 54 | 56 |
per 1000 newborns | 14.1 | 12.3 | 12.8 |
- among singletons | 8.8 | 8.3 | 8.5 |
- among multiples | 23.8 | 20.4 | 21.1 |
Major congenital anomaly cases, N | 68 | 185 | 179 |
per 10 000 newborns | 157 | 422 | 409 |