Article Text

Download PDFPDF
Pregnancy within 8 months of a previous birth was associated with an increased rate of preterm birth

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

OpenUrlCrossRefPubMedWeb of Science

Question Are short interpregnancy intervals, defined as ≤8 months, associated with an increased risk of low birth weight or preterm delivery?


Cohort study.




10 187 women who had 2 births between 1980 and 1992. Exclusion criteria were multiple births, stillbirths, and incomplete records for birth weight and gestational age of the child.

Assessment of risk factors

Interpregnancy interval was defined as ≤4, 4.01–8.00, 8.01–12.00, 12.01–24.00, 24.01–36.00, and >36 months and calculated as the difference between the birthdate of the first child and estimated date of conception of the second child in the study pair. The interval 24.01–36.00 months was taken as the reference standard (odds ratio [OR] 1.0). Other risk …

View Full Text


  • Source of funding: Danish National Research Council.

  • For correspondence: Dr O Basso, The Danish Epidemiology Science Centre at the Department of Epidemiology and Social Medicine, Aarhus University, Høegh-Guldberg Gade 10, DK 8000, Aarhus C, Denmark. Fax +45 8613 1580.