Simple Random Sample of all birth certificates in Mexico 2010-2023

<b>Background:</b><br>C-section rates in Mexico have risen dramatically over the past decade, reaching 55% by 2023. While life-saving when medically indicated, excessive use may alter the natural timing of childbirth and shift population-level birth outcomes.<b>Objectives:</b><br>To examine trends in gestational age, birth weight, and birth length from 2010 to 2023, and evaluate their association with mode of delivery.<b>Design:</b><br>Population-based trend analysis using national birth certificate data.<b>Methods:</b><br>We analyzed a 1-in-1,000 random sample of birth certificates from Mexico’s national registry (n = 27,320) for 2010–2023.

**背景：**<br>过去十年来，墨西哥剖宫产（Cesarean Section，C-section）率大幅攀升，至2023年已达55%。剖宫产在存在明确医学指征时可挽救生命，但过度使用可能改变自然分娩的时间进程，并改变人群层面的分娩结局。<br>**研究目标：**<br>分析2010年至2023年的胎龄、出生体重及出生身长变化趋势，并评估其与分娩方式的关联。<br>**研究设计：**<br>采用全国出生证明数据开展人群趋势分析。<br>**研究方法：**<br>本研究对墨西哥国家出生登记系统2010-2023年的出生证明进行1:1000随机抽样，样本量为27320并开展分析。