Table 3 Demographic characteristics in 29 twin pregnancies. Demographic characteristics of 29 twin pregnancies from 12 hospitals in Korea
Characteristic | Value |
|---|---|
No. of patients with twins | 29 |
Maternal age - year | |
 Mean | 35 |
 Range | 22 ~ 43 |
Gestational age - week | |
 Mean | 14 |
 Median | 13 |
 Range | 11 ~ 21 |
Pregnancy trimester - no. (%) | |
 First: 1–13 week gestation | 16 (55.2) |
 Second: 14–26 week gestation | 13 (44.8) |
 Male fetus - no. (%) | 26 (48.1) |
 Female fetus - no. (%) | 28 (51.9) |