Simon N V, Deter R L, Shearer D M, Levisky J S
Department of Obstetrics and Gynecology, York Hospital, Pennsylvania 17405.
J Clin Ultrasound. 1989 May;17(4):237-43. doi: 10.1002/jcu.1870170402.
Individual growth curve standards for five fetal anatomic parameters (head and abdominal circumferences, head and abdominal cubes, and femur diaphysis length) and estimated fetal weight were prospectively developed in 70 pregnant women who delivered infants with growth considered appropriate-for-menstrual age. For this purpose, we used the Rossavik growth model (P = c(t) kappa + s(t], model specification functions previously reported, and the data of two scans before 27.0 weeks of menstrual age, separated by an interval of at least 5 weeks. The anatomic parameters and estimated weights of these fetuses in the last 14 weeks of gestation were found to have values close to their projected standards. Whereas there was a significant, although small, systematic error of overprediction for most of the parameters and estimated fetal weight, deviations between observed and expected values were, with few exceptions, within the ranges established by Deter for normal growth. This study demonstrates that the Rossavik growth model could be used to predict normal fetal growth in a sample of patients different from those from which the model was developed.
前瞻性地为70名孕妇制定了五个胎儿解剖参数（头围、腹围、头立方、腹立方和股骨干长度）以及估计胎儿体重的个体生长曲线标准，这些孕妇分娩的婴儿生长情况被认为与孕龄相符。为此，我们使用了罗萨维克生长模型（P = c(t) κ + s(t)，此前报道的模型规范函数），以及月经龄27.0周前两次扫描的数据，两次扫描间隔至少5周。结果发现，这些胎儿在妊娠最后14周的解剖参数和估计体重的值接近其预测标准。尽管大多数参数和估计胎儿体重存在显著但较小的系统性高估误差，观察值与预期值之间的偏差除少数例外，均在德特尔确定的正常生长范围内。这项研究表明，罗萨维克生长模型可用于预测与开发该模型的患者样本不同的患者样本中的正常胎儿生长情况。
