• Vienna Institute of Demography (Ed.) - Éva Beaujouan - Marie-Caroline Compans - Alice Goisis - Jasmin Passet-Wittig (Guest Eds.)

Vienna Yearbook of Population Research 2026

Special issue: Delayed reproduction

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The Vienna Yearbook of Population Research is an open access journal that features contributions addressing population trends as well as a broad range of theoretical and methodological issues in population research. Besides Research articles and Review articles, the journal includes Data and Trends contributions, which analyse changes in population dynamics or present databases and data infrastructure. It also features Perspectives articles, which focus on ideas, concepts or theories, as well as invited Debates reflecting on selected questions and issues. Since 2008, the volumes have been devoted to selected themes following special calls for thematic issues.

The 2026 volume of the Vienna Yearbook of Population Research brings together a diverse set of contributions examining delayed reproduction as a defining feature of contemporary demographic change. The papers explore how later transitions to parenthood reshape reproductive trajectories, fertility intentions and birth outcomes for individuals and societies. Particular emphasis is placed on heterogeneities and inequalities by educational background, migration status, and place of residence. Using both quantitative and qualitative approaches and drawing on data from Europe, the Americas, and Asia, the issue highlights that delayed reproduction is a lasting trend with significant consequences for future fertility and societies more broadly.
Verlag der Österreichischen Akademie der Wissenschaften
Austrian Academy of Sciences Press
A-1011 Wien, Dr. Ignaz Seipel-Platz 2
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Vienna Yearbook of Population Research 2026
ISSN 1728-4414
Print Edition
ISSN 1728-5305
Online Edition
ISBN 978-3-7001-5156-2
Print Edition
ISBN 978-3-7001-5157-9
Online Edition



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Verlag der Österreichischen Akademie der Wissenschaften
Austrian Academy of Sciences Press
A-1011 Wien, Dr. Ignaz Seipel-Platz 2,
Tel. +43-1-515 81/DW 3420, Fax +43-1-515 81/DW 3400
https://verlag.oeaw.ac.at, e-mail: bestellung.verlag@oeaw.ac.at
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The meaning and measurement of unrealised fertility: A comparison of measures among women aged 40–49 in the United States

    Kathleen Broussard

Vienna Yearbook of Population Research 2026, pp. 1-26, 2026/05/27

Special issue: Delayed reproduction

doi: 10.1553/p-bcn9-6a59


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doi:10.1553/p-bcn9-6a59

Abstract

Unrealised fertility – when people fall short of their childbearing goals – is inconsistently defined and measured, leading to wide variation in estimates of its prevalence and implications for health and well-being. Using a nationally representative sample of U.S. women aged 40–49, this study compares four potential approaches to measurement, finding prevalence estimates that range from 3.5% to 22.4% across indicators. Multivariable logistic regression models reveal that the social and reproductive health correlates of unrealised fertility also vary according to the selected indicator. Improved measures of unrealised fertility are needed to inform our understanding of fertility barriers, including who is most affected, and policies that support people in achieving their childbearing goals.

Keywords: Unrealised fertility • Fertility goals • Meaning • Survey measurement

Published Online: 2026/05/27

Object Identifier: 0xc1aa5572 0x00419a46

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Metrics: https://plu.mx/plum/a/?doi=10.1553/p-bcn9-6a59

Rights: © The Author(s), Austrian Academy of Sciences, Vienna 2026. This article/book is published under the terms of the Creative Commons Attribution 4.0 International Public License (https://creativecommons.org/licenses/by/4.0/) that allows the sharing, use and adaptation in any medium, provided that the user gives appropriate credit, provides a link to the license, and indicates if changes were made.