Crown-Rump Length

**Definition:** In utero measurement corresponding to the sitting height (crown to rump) of the fetus. Length is considered a more accurate criterion of the age of the fetus than is the weight. The average crown-rump length of the fetus at term is 36 cm. (From Williams Obstetrics, 18th ed, p91)

**Tree numbers:** - E01.370.600.115.100.160.100.500 - E01.370.600.115.450.250.500 - E05.041.124.160.500.500 - G07.100.100.160.100.500 - G07.100.100.250 - G07.100.175.250.500 - N06.850.505.200.100.400