Background: Previous studies have investigated immigrant fertility in various European countries, but only a few have compared the fertility rates of women who migrated as children (1.5 Generation), women born in the host society to foreign-born parents (2 Generation), and women born in the host society with one foreign-born and one native-born parent (2.5 Generation). Objective: This study examines the first-, second-, and third-birth rates of three migrant generation groups in the United Kingdom – 1.5G, 2G, and 2.5G. The study investigates the role of sociocultural factors in shaping their fertility behaviour. Methods: Event history analysis is applied to longitudinal individual-level data (N = 24,228) from the UK Household Longitudinal Study (2009–2021). Results: Pakistani and Bangladeshi women who arrived in the United Kingdom as children exhibit elevated fertility at all birth orders, partly consistent with socialization theory. No clear convergence emerges among women born in the United Kingdom with one immigrant parent and one UK-born parent (2.5G) across all groups from different migrant-origin backgrounds. Instead, certain 2.5G groups show distinct fertility patterns. The influence of sociocultural factors on fertility varies by birth order and migrant generation, highlighting the need for a detailed approach that considers both cultural and socioeconomic dimensions. Contribution: This study is one of the first to differentiate the fertility behaviours of 1.5G, 2G, and 2.5G women in the United Kingdom. It reveals important variations in childbearing behaviour, which have implications for understanding intergenerational differences and the influence of sociocultural factors on migrant fertility.

中文翻译：

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英国移民世代之间的生育率差异（作者：Jiseon Baek、Hill Kulu、Sarah Christison、Francesca Fiori）

背景：以前的研究调查了各个欧洲国家的移民生育率，但只有少数研究比较了童年移民的妇女（1.5 代）、在东道国社会出生的妇女与外国出生的父母（2 代）以及在东道国社会出生的妇女与一个外国出生的父母和一个本地出生的父母（2.5 代）。目的：本研究考察了英国三个移民一代群体（1.5G、2G 和 2.5G）的第一、第二和第三生育率。该研究调查了社会文化因素在塑造他们的生育行为中的作用。方法：事件历史分析应用于英国家庭纵向研究 （24,228-2009） 中的纵向个人水平数据 （N = 2021）。结果：儿童时期抵达英国的巴基斯坦和孟加拉国妇女在所有出生顺序上都表现出较高的生育率，这在一定程度上与社会化理论一致。在英国出生的女性中，父母一方是移民，父母一方是英国出生的父母 （2.5G），来自不同移民背景的所有群体中没有明显的趋同。相反，某些 2.5G 组显示出不同的生育模式。社会文化因素对生育率的影响因出生顺序和移民世代而异，这凸显了需要一种同时考虑文化和社会经济维度的详细方法。贡献： 这项研究是最早区分英国 1.5G、2G 和 2.5G 女性生育行为的研究之一。它揭示了生育行为的重要变化，这对理解代际差异和社会文化因素对移民生育率的影响具有重要意义。