Table 3 Body parameters and corresponding gestational ages for right and left twins
Macroscopic examination | Measured value (mm) | Gestational age (weeks) | ||
|---|---|---|---|---|
Right twin | Left twin | Right twin | Left twin | |
Crown–rump length | 285 | NA | 30 | NA |
Crown–heel length | 430 | NA | 32 | NA |
Head circumference | 300 | NA | 32 | NA |
Outer canthal distance | 60 | 65 | 35 | 40 |
Inner canthal distance | 20 | 25 | 35 | 42 |
Abdominal circumferencea | 310 | 310 | 36 | 36 |
Internipple distancea | 55 | 310 | 31 | 31 |
Foot length | 51 | 57 | 27 | 29 |
CT and MRI scan | ||||
Femur lengthb | 58 | 58 | 31 | 31 |
Biparietal diameter | 77 | NA | 29 | NA |