Hand Measurements.

Hand Measurements.
Average measurements of the male and female hand to size up the reproductive tract or fetus per rectum. CRL (crown rump length) approximately 9 cm at 2 months, 22 cm at 4 months, 44 cm at 6 months, 80 cm at 8 months, and 100 cm at 9 months.

Löfstedt RM (2010)