Table 2 Differences between the twins at birth
Twin A (Gestational age range in weeks +/-2SD) | Twin B (Gestational age range in weeks +/-2SD) | |
|---|---|---|
Weight (gm)* | 980 (26–30) | 2160 (30–36) |
Length (cm)* | 36.5 (27–29) | 42.5 (30–34) |
Circumference head (cm)* | 27 (27–31) | 31 (31–37) |
New Ballard Score | 15 (30 +/- 2 weeks) | 32 (36 +/- 2 weeks) |
Epiphysis lower end of femur | Absent (Less than 31 weeks) | Present (31 – 40 weeks) |
Epiphysis upper end tibia | Absent (Less than 34 weeks) | Present (34 – 5 post natal weeks) |
Calcified crown of 1st deciduous molar | Absent (less than 33 weeks) | Present (more than 33 weeks) |
Calcified crown of 1st deciduous molar | Absent (less than 36 weeks) | Present (more than 36 weeks) |
Cornea | Haze present | Transparent |
Retinal vessels migration | Not reached nasal ora serrata (less than 36 weeks)** | Complete on the nasal side and near complete on the temporal side. (more than 36 weeks)** |