Pregnancy spacing among women delaying initiation of childbearing

Autor: Martha S. Wingate, John Owen, Sarah K. Nabukera, Russell S. Kirby, Greg R. Alexander, Shailender Swaminathan, Hamisu M. Salihu
Rok vydání: 2008
Předmět:
Zdroj: Archives of Gynecology and Obstetrics. 279:677-684
ISSN: 1432-0711
0932-0067
DOI: 10.1007/s00404-008-0793-2
Popis: An increasing proportion of women in the US and other countries delay initiation of childbearing until their thirties. Little is known about their subsequent pregnancies, particularly with regard to pregnancy spacing. To determine interpregnancy interval (IPI) patterns, factors associated with IPI among women delaying initiation of childbearing until their thirties, and ascertain if delay in initiation of childbearing is associated with increased likelihood for short interpregnancy interval of less than 6 months. A retrospective cohort study was performed using the Missouri maternal linked file for 1978–1997, inclusive. Analysis was limited to mothers aged 20–50 years at first pregnancy, having a first and second pregnancy during the study period; the sample size included 242,559 mother–infant pairs. Analysis strategies included stratified analysis, and multivariable logistic regression. Interpregnancy interval was main outcome variable, and was grouped in seven categories: 0–5, 6–11, 12–17, 18–23, 24–59, 60–119, ≥120 months. The mean interpregnancy interval was significantly shorter for women delaying start of childbearing (≥30 years) compared to 20–29 year olds. Observed intervals are 31 (±24) months for mothers aged 20–29 years, 25 (±17) months for mothers aged 30–34 years, 21 (± 14) for 35–39 year olds, and 19 (±16) for 40–50 year olds (P
Databáze: OpenAIRE
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