Table 1 Maternal and fetal characteristics of the twin pregnancies by chorionicity
characteristic | MC twins | DC twins | All |
|---|---|---|---|
Mother | n = 107 | n = 291 | n = 398 |
Maternal age, yrs | 28.7 ± 2.9 | 30.2 ± 2.6 | 29.8 ± 2.8 |
Nulliparous | 87(81.3) | 269(92.4) | 356(89.5) |
Height, m | 1.62 ± 0.04 | 1.62 ± 0.04 | 1.62 ± 0.04 |
Weight, kg | 54.3 ± 7.2 | 56.5 ± 9.0 | 55.9 ± 8.6 |
Conception methods | |||
Conceived naturally | 93(86.9) | 52(17.9) | 145(36.4) |
Ovulation induction | 2(1.9) | 36(12.4) | 38(9.6) |
In vitro fertilization | 12(11.2) | 203(69.8) | 215(54.0) |
Ultrasound scans | 10(8,11) | 2(1,6) | 5(1,8) |
Fetus | n = 214 | n = 582 | n = 796 |
Gestational age at delivery, wks | 35.9 ± 1.2 | 36.7 ± 1.1 | 36.5 ± 1.2 |
Birthweight, g | 2453.9 ± 361.6 | 2608.6 ± 328.4 | 2567.0 ± 344.3 |
Sex | |||
Male | 104(48.6) | 312(53.6) | 416(52.3) |
Female | 110(51.4) | 270(46.4) | 380(47.7) |