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. 1984 Mar;38(1):79-80.
doi: 10.1136/jech.38.1.79.

Epidemiology of pregnancies with unknown last menstrual period

P Buekens, P Delvoye, E Wollast, C Robyn

Epidemiology of pregnancies with unknown last menstrual period

P Buekens et al. J Epidemiol Community Health. 1984 Mar.

Abstract

A group of women with unknown last menstrual period was studied representing 16% of a total of 22 404 pregnant women recorded using a common perinatal form. Unknown menstrual period is associated with high rates of low birth weight and with low socioeconomic and sociodemographic status. Such characteristics are also associated with a high rate of preterm deliveries. Thus any possible bias introduced in studies of prematurity by ignoring the group of women with unknown last menstrual period should be carefully checked.

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