BMJ  2005;330 (19 February), doi:10.1136/bmj.330.7488.0-e

Subfecundity increases the risk of neonatal death

A long time to pregnancy (subfecundity) is associated with an increased risk of neonatal death. In Denmark, Basso and Olsen (p 393) examined the association through logistic regression (adjusting for mother's age, body mass index, smoking, and social class) of the data for 27 624 singleton babies and their mothers who were part of the Danish national birth cohort. The babies of women who tried for longer than one year to conceive their first child had a higher risk of neonatal death than those conceived sooner (adjusted odds ratio 2.82, 95% confidence interval 1.35 to 5.90). The finding needs to be corroborated elsewhere, the authors say.

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Subfecundity and neonatal mortality: longitudinal study within the Danish national birth cohort

Olga Basso and Jørn Olsen
BMJ 2005 330: 393-394. [Full Text] [PDF]