Objectives-To evaluate the impact of extremely low frequency (ELF) magnetic fields on markers of human fertility.
Methods-A follow up study of time to pregnancy, semen quality, and reproductive hormones was conducted among couples planning first pregnancies (36 males were welders and 21 were non-welders).
The male and the female partner were monitored for exposure to ELF magnetic field by personal exposure meters.
As measures of exposure the median value was calculated together with the 75 percentile value and the proportion of measurements exceeding 0.2 and 1.0 muT, respectively.
Each summary measure was divided in three categories : low, medium, and high.
Couples in which the man had a medium or a high proportion of measurements>1.0 muT had a reduced probability of conception per menstrual cycle compared with the men with low exposure, but the result was only significant for the men with medium exposure.
This finding was partly attributable to a high probability of conception per menstrual cycle among the men with low exposure compared with non-welders in the original cohort of 430 couples.
Other summary measures were not related to probability of conception or other markers of fertility.
A possible negative association was found between high probability of conception and female exposure measures based on the median, the 75 percentile, and the proportion of measurements>0.2 muT, but no association was found with the proportion of measurements>1.0 muT. (...)
Mots-clés Pascal : Exposition professionnelle, Médecine travail, Extrême basse fréquence, Champ magnétique, Soudage arc, Cycle menstruel pathologie, Toxicité, Etude longitudinale, Etude cas témoin, Fertilité, Fécondité, Relation dose réponse, Sperme pathologie, Homme, Appareil génital femelle pathologie
Mots-clés Pascal anglais : Occupational exposure, Occupational medicine, Extremely low frequency, Magnetic field, Arc welding, Menstruation disorders, Toxicity, Follow up study, Case control study, Fertility, Fecundity, Dose activity relation, Semen disorders, Human, Female genital diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0187241
Code Inist : 002A08E. Création : 16/11/1999.