Fertility among Danish male welders.

Risk of lung cancer according to mild steel and stainless steel welding

“…Responses were received for 8376 cohort members (83%). Four questionnaires lacked information on basic characteristics, leading to 8372 answers suitable for analysis (1,23). Of these, 6224 were from ever welders and 2148 (26%) were from never-welding metalworkers.…”

“…To minimize the incompleteness of the registration of the cohort members, the cohort was created in two phases with the use of two independent data sources (1,23). In phase one, the companies included in the study were asked to establish a roster of men who had ever been employed as production workers.…”

Adverse pregnancy outcome and childhood malignancy with reference to paternal welding exposure.

“…An increased rate of sister chromatid exchanges and chromosome aberration in peripheral lymphocytes of stainless steel welders has been reported by several research groups (22). However, detrimental effects on semen quality and fertility among welders seem to be the most attributable to mild steel welding (18,20).…”

“…The second line of evidence links poor semen quality in humans with an increased rate of spontaneous abortion (15,16). Several studies suggest that welding is detrimental to male reproductive capability, causing reduced semen quality (17,18) and fertility (19,20).…”

Sex ratio of offspring as a criterion of occupational hazard, with reference to welding.

“…Concern has been expressed about the fertility of men occupationally exposed to heat (1,2), for example, welders (3,4). Such suspicion is supported by the significantly high proportion of welders with poor sperm quality (5).…”