Characteristics | N = 427 |
---|---|
Age – years a | 30.1 ± 5.9 |
Age group—n (%) | |
• < 20 years | 21 (4.9) |
• 20–34 years | 306 (71.7) |
• ≥ 35 years | 100 (23.4) |
Mean pre-pregnancy BMI (kg/m2) | 21.65 (3.9) |
BMI category – n (%) | |
• < 18.5 kg/m2 | 87 (20.3) |
• 18.5 – 24.9 kg/m2 | 264 (61.8) |
• 25 – 29.9 kg/m2 | 62 (14.6) |
• ≥ 30 kg/m2 | 14 (3.3) |
Mean weight gain during pregnancy – kg a | 15.2 ± 5.9 |
Nulliparous – n (%) | 197 (46.1) |
History of preterm birth – n (%) | 11 (2.6) |
In vitro fertilization method—n (%) | 71 (16.6) |
Underlying medical conditions | |
• Anemia—n (%) | 64 (14.9) |
• Chronic hypertension—n (%) | 6 (1.4) |
• Overt diabetes mellitus—n (%) | 2 (0.5) |
• Hypothyroidism—n (%) | 7 (1.6) |
• Hyperthyroidism—n (%) | 7 (1.6) |
• Connective tissue diseases—n (%)b | 1 (0.2) |
Twins—n (%) | 413 (96.7) |
• Dichorionic diamniotic– n (%) | 172 (41.65) |
• Monochorionic diamniotic– n (%) | 219 (53.03) |
• Monochorionic monoamniotic– n (%) | 22 (5.15) |
Triplets—n (%) | 13 (3.04) |
Quadruplets—n (%) | 1 (0.23) |