Department of Gynaecology, University Medical Center Freiburg, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
Biological Anthropology, Medical Faculty, University Freiburg, Freiburg, Germany.
J Perinat Med. 2020 Sep 25;48(7):656-664. doi: 10.1515/jpm-2020-0085.
Objectives Measurement of birth length and birth head circumference is part of the newborn assessment. Both measurements aid in distinguishing between proportionate and disproportionate small and large for gestational age newborns. It had been shown that birth weight is related to maternal height and weight. This study aims to analyze birth length and birth head circumference percentiles based on maternal stature. Methods This observational study analyzed birth length and birth head circumference percentiles of 2.3 million newborns stratified by maternal height and weight from the first obstetric assessment. Percentiles were calculated for sex and 22-43 gestational weeks for all infants. Eighteen subgroups based on six maternal height and three weight strata were defined and percentiles calculated from 32 to 42 gestational weeks using GAMLSS package for R. Results Newborns of mothers with height <158 cm and weight <53 kg (short stature) had a rate of preterm birth of 9%, compared to 5% in the tall stature group (height >177 cm, weight >79 kg). Small stature mothers were 1.7 years younger. Birth length differed by several centimeters for the same percentiles between groups of short and tall stature mothers, whereas birth head circumference differed up to 1.2 cm. The largest deviation of birth length was between the 97th percentiles. For male newborns born at term, birth length at the 97th percentile differed by 3.2 cm, at the 50th percentile by 2.7 cm and at the third percentile by 2.5 cm. Conclusions Birth length and birth head circumference are related to maternal height and weight. To more completely assess newborns, the maternal size should be considered.
目的
测量出生长度和头围是新生儿评估的一部分。这两个测量值有助于区分比例性和不成比例性的小和大的胎龄新生儿。已经表明，出生体重与母亲的身高和体重有关。本研究旨在分析基于母体身高的出生长度和头围百分位数。
方法
本观察性研究分析了来自首次产科评估的 230 万新生儿的出生长度和头围百分位数，按母亲的身高和体重分层。所有婴儿的性别和 22-43 孕周的百分位数均进行了计算。根据母亲身高和体重的六个和三个分层，定义了 18 个亚组，并使用 R 中的 GAMLSS 包计算了 32-42 孕周的百分位数。
结果
身高<158cm且体重<53kg（矮小身材）的母亲所生新生儿早产率为 9%，而身高>177cm且体重>79kg（高大身材）的母亲早产率为 5%。矮小身材的母亲平均年轻 1.7 岁。对于同一百分位，矮小身材母亲和高大身材母亲的出生长度相差数厘米，而头围相差 1.2cm。最大的出生长度偏差发生在第 97 百分位。对于足月出生的男性新生儿，第 97 百分位的出生长度相差 3.2cm，第 50 百分位的出生长度相差 2.7cm，第 3 百分位的出生长度相差 2.5cm。
结论
出生长度和头围与母亲的身高和体重有关。为了更全面地评估新生儿，应考虑母体大小。
