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Paternal occupational lead exposure and spontaneous abortion
M L Lindbohm1, M Sallmén, A Anttila
1Institute of Occupational Health, Helsinki, Finland.
Scandinavian Journal of Work, Environment & Health
|April 1, 1991
Summary
Paternal occupational lead exposure may increase the risk of spontaneous abortion, particularly when exposure occurs during sperm development. Further research is needed to confirm this association.
Area of Science:
- Occupational Health
- Reproductive Toxicology
- Environmental Epidemiology
Background:
- Occupational exposure to inorganic lead is a known health hazard.
- The potential reproductive effects of paternal lead exposure on spontaneous abortion require further investigation.
Purpose of the Study:
- To investigate the association between occupational lead exposure in men and spontaneous abortion in their wives.
- To explore potential modifying factors such as paternal alcohol use and maternal age.
Main Methods:
- A case-referent study design was employed.
- Cases (213 spontaneous abortions) and referents (300 births) were identified from medical registers.
- Paternal lead exposure was assessed using blood lead (PbB) measurements and questionnaires.
Main Results:
- No statistically significant relationship was found between spontaneous abortion and paternal lead exposure overall.
- A significant increased risk of spontaneous abortion was observed when paternal blood lead levels (PbB ≥ 1.5 µmol/l) were high during or near spermatogenesis.
- The association was modified by maternal age and paternal alcohol consumption.
Conclusions:
- Paternal occupational lead exposure may be associated with an increased risk of spontaneous abortion.
- Specific exposure timing (during spermatogenesis) and co-exposures (alcohol) may play a role.