Characteristic | Number of cases (n, %) |
---|---|
Maternal age | |
Median (years) | 29 |
Range (years) | 18–48 |
18–24 years | 130 (12.4%) |
25–29 years | 455 (43.4%) |
30–34 years | 332 (31.7%) |
≥ 35 years | 131 (12.5%) |
Gestational age | |
Median (weeks) | 16 |
Range (weeks) | 12–28 |
12–15 weeks | 322 (30.7%) |
16–19 weeks | 670 (63.9%) |
20–23 weeks | 46 (4.4%) |
24–27 weeks | 9 (0.9%) |
≥ 28 weeks | 1 (0.1%) |
Chorionicity | |
MCMA | 9(0.9%) |
MCDA | 154 (14.7%) |
DCDA | 879 (83.9%) |
Unknown chorionicity | 6(0.6%) |
Conjoined twins | 0 (0.0%) |
Type of pregnancy | |
Assisted pregnancy | 318 (30.3%) |
Natural pregnancy | 730 (69.7%) |