Andersen H F, Johnson T R, Barclay M L, Flora J D
Am J Obstet Gynecol. 1981 Jan 15;139(2):173-7.
Accurate assessment of the estimated date of confinement is a cornerstone of obstetric care. Traditionally this date has been predicted from historical and clinical examinations; however, there have been few studies of the accuracy of such predictions. Multiple estimators of gestational age were examined in 418 patients who were delivered of infants weighting larger than or equal to 3,000 gm, following spontaneous onset of labor. Mean intervals from an event to delivery were calculated for last menstrual period (284.2 days), quickening (156.3 days), first audible fetal heart tones (136.2 days), uterine fundus at the umbilicus (140.8 days), and measurements of the fundal height. The variability in each of these estimators was examined and compared. The last menstrual period, if known with certainty, is the most accurate estimator, followed by the uterus at the umbilicus, first heard fetal heart tones, fundal height, and quickening.
准确评估预产期是产科护理的基石。传统上，这个日期是根据病史和临床检查来预测的；然而，关于此类预测准确性的研究很少。对418例自然发动分娩且婴儿体重≥3000克的患者进行了多种孕周估算方法的研究。计算了末次月经（284.2天）、胎动（156.3天）、首次听到胎心音（136.2天）、子宫底平脐（140.8天）以及宫高测量值至分娩的平均间隔时间。对这些估算方法各自的变异性进行了检查和比较。如果能确切知晓末次月经时间，它是最准确的估算方法，其次是子宫底平脐、首次听到胎心音、宫高和胎动。
