[Adverse effects of the work process in relation to pregnancy]

Some characteristics of the working activity of pregnant women were investigated during statistical analysis of data pertaining to 6166 naturally terminated pregnancies in the Gottwaldov district (1981-1983). The threatening element from the aspect of spontaneous abortions in the first trimester is work done during most of the shift in a standing position without movement. There also the highest incidence of small-for-age and hypotrophic foetuses was found. Work involving constant movement is a risk and may lead to premature delivery. Manipulation with loads threatens pregnancy by reproductive losses (in particular a higher incidence of haemorrhage during the first trimester) and by prematurity. Social tension at the place of work also threatens pregnancy - at conflict in work places a significantly increased risk was proved. It was also proved that it is important to respect medical recommendation to transfer pregnant women to other work. As to associated factors, commuting was investigated and its adverse effect is particularly apparent when the distance is more than 25 km.