Table 1 Perinatal, maternal and adult phenotypic characteristics of the female MZ twins discordant for birth weight
Characteristic | Heavier co-twins | Lighter co-twins | Range | P a |
|---|---|---|---|---|
N | 17 | 17 | ||
Perinatal | ||||
Gestational age (weeks)b | 37.9 ± 2.4 | 37.9 ± 2.4 | (34-42) | |
Birth weight (g) | 2,619 ± 319 | 1,921 ± 278 | (1,440-3,100) | <0.0001 |
Umbilical cord insertionb | ||||
(Para)central | 12 (75%) | 4 (25%) | ||
(Para)marginal | 4 (25%) | 9 (56%) | ||
Velamentous | 0 (0%) | 3 (19%) | 0.008 | |
Maternal | ||||
Maternal age (years) | 26.9 ± 5.4 | 26.9 ± 5.4 | (18-43) | |
Parity | 1.8 ± 1.0 | 1.8 ± 1.0 | (1-4) | |
Adult | ||||
Age (years) | 34.4 ± 7.1 | 34.4 ± 7.1 | (22-45) | |
Body height (cm) | 166.9 ± 6.1 | 165.5 ± 6.7 | (155-177) | 0.13 |
Body weight (kg) | 62.7 ± 12.3 | 61.2 ± 14.2 | (47.5-102) | 0.18 |
Body mass index (kg/m2) | 22.5 ± 3.8 | 22.3 ± 4.5 | (16.7-33.7) | 0.60 |