Vollebergh J H, Jongsma H W, van Dongen P W
Department of Obstetrics and Gynaecology, Sint Radboud Hospital, Catholic University, Nijmegen, The Netherlands.
Eur J Obstet Gynecol Reprod Biol. 1989 Mar;30(3):253-6. doi: 10.1016/0028-2243(89)90009-9.
Routine ultrasonic crown-rump length measurements were retrospectively evaluated in an antenatal clinic using maternal body temperature graphs as reference to ovulatory age. A comparison with the original figures of Robinson is made. Potential errors are discussed. The conclusion is that one should be very careful in interpreting an ultrasonic CRL measurement before 10 weeks menstrual age because of both measurement and operator errors.
在一家产前诊所，以孕妇体温图作为排卵年龄的参考，对常规超声测量的头臀长度进行了回顾性评估。并与罗宾逊的原始数据进行了比较。讨论了潜在的误差。结论是，由于测量和操作人员的误差，在月经龄10周之前解读超声头臀长度测量结果时应非常谨慎。
