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超声波胎儿体重估计百分位数在妊娠第二季度应谨慎解释

Ben Melamed¹, Elad Mei-Dan², Amir Aviram¹

¹Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario, Canada.

International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics

|November 25, 2025

概括

由于对错误的敏感性,胎儿体重 (EFW) 百分点的超声波估计在妊娠25周之前不太可靠. 腹周 (AC) 百分位为早期怀孕中诊断胎儿生长限制 (FGR) 提供了更可靠的衡量标准.

科学领域:

孕产妇和胎儿的医学
在产科中诊断成像.
胎儿成长评估胎儿成长评估

背景情况:

准确的胎儿体重估计对于识别胎儿生长异常至关重要.
第二个三个月的超声波生物测量通常用于胎儿体重估计.
怀孕早期的限制可能会影响胎儿生长限制的及时诊断.

研究的目的:

划出第二个三个月的超声波胎儿体重 (EFW) 百分位数的局限性.
将EFW百分位数的准确性与单个胎儿生物识别指数进行比较.
建立一个妊娠年龄值,可靠诊断胎儿生长限制 (FGR).

主要方法:

使用1991年哈德洛克方法描述EFW限制的模拟.
来自第三级中心的单独怀孕队列 (2014-2023) 的分析.
通过ROC曲线,检测率和预测值评估的诊断准确性.

主要成果:

在怀孕25周之前,EFW百分位对轻微的约会或测量错误非常敏感.
在怀孕早期,腹周 (AC) 百分位表现出比EFW百分位更高的可靠性.
预测低出生体重 (<第10个百分位数) 的EFW百分位数的正预测值 (PPV) 在25周之前急剧下降.

结论:

在怀孕25周之前,超声波EFW百分位数的可靠性较低.
解释EFW百分位数在这个早期妊娠期需要谨慎.
在25周之前,AC百分位可能会成为评估胎儿成长的更强有力的指标.

关键词:

估计胎儿体重的估计.胎儿生长限制限制胎儿生长对于妊娠年龄来说小.超声波超声波是指超声波的使用.

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