Reuters reported: "In a Danish review of registry data on 45,658 seven-year-old children and their mothers, 18.6 percent of children of mothers who were exposed to low-molecular-weight particles and irritants at work during pregnancy contracted asthma, compared to 16.1 percent of the general population."
See: Mothers work exposure during pregnancy and asthma in their children, a prospective cohort-study; B. H. Christensen, A. D. Larsen, L. R. Skadhauge, A. M. Thulstrup, K. S. Hougaard, K. S. Hansen, M. Frydenberg, V. Schlünssen (Aarhus, Copenhagen, Esbjerg, Gentofte, Denmark)