© 1990 Oxford University Press
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Heavy Lifting during Pregnancy—A Hazard to the Fetus? A Prospective Study
,#
*
rebro Medical Center Hospital, Department of Occupational Medicine Orebro, Sweden.
**University Hospital, Department of Occupational Health Link
ping, Sweden
rebro County Council, Unit of Community Medicine rebro, Sweden.
Karolinska Hospital, Department of Occupational Medicine Stockholm, Sweden.
#National Institute of Occupational Health, Unit of Occupational Medicine Solna, Sweden.
Ahlborg Jr, G (rebro Medical Center Hospital, Department of Occupational Medicine, rebro, Sweden), Bodin L and Hogstedt C. Heavy lifting during pregnancy—A hazard to the fetus? A prospective study. International Journal of Epidemiology 1990, 19: 90–97.
The influence of heavy lifting during pregnancy on gestational age, birthweight and the risk of fetal death (spontaneous abortion or stillbirth) was investigated in a prospective study of 3906 occupationally active women. Information on exposure was collected at the women's first contact with the antenatal care centres in rebro County from October 1980 to June 1983. Logistic and linear regression were used to analyse the data, allowing for several non-occupational factors in the models. Women who reported heavy lifting did not have in general more unfavourable outcomes than other women, although the risk estimates varied between different occupational categories. Lifting of weights 
12 kg more than 50 times per week increased the risk of pre-term birth (<37 weeks of gestation—odds ratio 1.7), but only among women who stopped working before the 32nd week of pregnancy. Unfavourable outcomes were more common among those who reported chemical exposure during pregnancy. The preventive routines and regulations in Sweden may have helped to reduce possible risks from heavy lifting during pregnancy.
Revised 1 July 1989
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