hCG, median (95 % range), IU/l, |
35559.0 (6106.8–101808.5) |
Birth weight, mean (SD), g |
3412.0 (559.7) |
Gestational age at blood sampling, median (95 % range), weeks |
14.4 (10.1–26.2) |
Gestational age at birth, mean (SD), weeks |
39.8 (1.9) |
Age, mean (SD), years |
29.6 (5.3) |
BMI, median (95 % range), kg/m2
|
23.9 (18.7–36.5) |
Parity, n (%)
|
Nullipara |
4531 (55.3) |
Primipara |
2475 (30.2) |
Multipara |
1187 (14.5) |
Smoking status, n (%)
|
Non smokers |
5953 (72.7) |
Stopped smokers |
691 (8.4) |
Smokers |
1549 (18.9) |
Educational level, n (%)
|
No education or primary education |
1046 (12.8) |
Secondary education |
3844 (46.9) |
Higher education |
3303 (40.3) |
Ethnicity, n (%)
|
Dutch |
3742 (46.6) |
Moroccan |
530 (6.6) |
Turkish |
710 (8.8) |
Surinam |
686 (8.5) |
Other-European |
598 (7.5) |
Other-Non-European |
1758 (21.9) |
Fetal sex, n (%)
|
Male |
4124 (50.3) |
Female |
4069 (49.7) |
Gestational weight gain, mean (sd), kg |
10.0 (5.1) |
Placental weight at birth (g), median, (95 % range) |
620.0 (390.0–950.0) |