Back طول تاجي مقعدي Arabic Scheitel-Steiß-Länge German Longitud céfalo-caudal Spanish Odległość ciemieniowo-siedzeniowa Polish Comprimento cabeça-nádega Portuguese 顶臀长 Chinese
Crown-rump length (CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump). It is typically determined from ultrasound imagery and can be used to estimate gestational age.