《英文msh詞典》Lengths,Crown-Rump
[入口詞] Lengths,Crown-Rump
[主題詞] Crown-Rump Length
[英文釋義] 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)