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.

<b>背景：</b><br>墨西哥的剖腹产（C-section）率在过去十年间显著上升，截至2023年已达55%。尽管在有医学指征时具有挽救生命的作用，但过度使用可能改变自然分娩的时机，并影响人群层面的分娩结局。<b>目的：</b><br>分析2010至2023年胎龄（gestational age）、出生体重（birth weight）和出生身长（birth length）的趋势，并评估其与分娩方式（mode of delivery）的关联。<b>设计：</b><br>基于人群的趋势分析，采用全国出生证明数据。<b>方法：</b><br>我们分析了2010–2023年墨西哥国家登记处出生证明的1/1000随机样本（n=27,320）。