Keen D V, Pearse R G
Arch Dis Child. 1985 May;60(5):440-6. doi: 10.1136/adc.60.5.440.
Data representing fetal weight gain between 14 and 42 weeks' gestation are presented; firstly to provide suitable curves enabling the growth of the very immature infant to be monitored and secondly to examine the influence of the improved techniques of paediatric and obstetric assessment developed since the publication of previous studies. Data have been collected from the 57 866 livebirths in Sheffield between 1976 and 1984 and from therapeutically terminated and spontaneously aborted fetuses over the same period. It seems that preterm livebirths do not form a different population with respect to weight from the fetus still in utero, at least until the beginning of the third trimester. Previous studies have reported a bimodality of weight distribution in preterm infants at each gestational age which has been attributed to errors in gestational assessment. The pattern of distribution of weight in this study suggests that early ultrasonography and paediatric assessment techniques have exerted a considerable influence on the accuracy of gestational assessment. The mean weights of the sample differ considerably from those of the Gairdner and Pearson chart which are, therefore, considered to be inappropriate for the Sheffield population.
文中呈现了妊娠14至42周期间胎儿体重增加的数据；一是为了提供合适的曲线，以便监测极不成熟婴儿的生长情况，二是为了研究自先前研究发表以来所开发的儿科和产科评估改进技术的影响。数据收集自1976年至1984年期间谢菲尔德的57866例活产婴儿，以及同期经治疗终止妊娠和自然流产的胎儿。至少在妊娠晚期开始之前，早产活产儿在体重方面似乎与仍在子宫内的胎儿没有形成不同的群体。先前的研究报告称，每个孕周的早产儿体重分布呈双峰模式，这被归因于孕周评估的误差。本研究中的体重分布模式表明，早期超声检查和儿科评估技术对孕周评估准确性产生了相当大的影响。样本的平均体重与盖尔德纳和皮尔逊图表中的平均体重有很大差异，因此，这些图表被认为不适用于谢菲尔德人群。
