Environmental and Biologic Determinants of Fertility, 1992-1997, lll

The study 'Industrial Environment and Reproduction 1992-1997, part 3' is a description of male's semen specimen. The study is very extensive. For this reason it is divided in seven parts. The present study (part 3) is only concerning male's semen specimen in order to evaluate moving patterns of spermatozoon, which might have great influence on ability to have children. #Further more this study is divided into two parts, a fragment for metal workers and a fragment for businessmen and clerical workers. #The purpose of the study is to clarify if industrial environment, health and lifestyle of metal workers have any significance according to involuntary childlessness and early pregnancy loss. #The semen specimens undergo a number of tests to evaluate their quality and to investigate, if there has been an influence of i injurious agents, which might have reduced their fertilising power. # #Focus is on following working conditions: #1. Stress