Shorter birth intervals between siblings are associated with increased risk of parental divorce

Venla Berg, Anneli Miettinen, Markus Jokela and Anna Rotkirch

PLOS ONE, 2020, vol. 15, issue 1, 1-17

Abstract: Birth intervals are a crucial component of fertility behaviour and family planning. Short birth intervals are associated—although not necessarily causally—with negative health-related outcomes, but less is known about their associations with family functioning. Here, the associations between birth intervals and marital stability were investigated by Cox regression using a nationally representative, register-based sample of individuals with two (N = 42,481) or three (N = 22,514) children from contemporary Finland (observation period 1972–2009). Shorter interbirth intervals were associated with an increased risk of parental divorce over a ten-year follow-up. Individuals with birth intervals of up to 1.5 years had 24–49 per cent higher divorce risk compared to individuals whose children were born more than 4 years apart. The pattern was similar in all socioeconomic groups and among individuals with earlier and later entry to parenthood. Our results add to the growing body of research showing associations between short birth intervals and negative outcomes in health and family functioning.

Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0228237

DOI: 10.1371/journal.pone.0228237

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