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[Influence of sport on the cardiovascular system in pregnancy (author's transl)].

Stroke volume and cardiac output were determined in 24 pregnant women at the end of the first and second trimenon. There was a decrease of cardiac output in 7 women (29%) and among these a decrease of stroke volume in 6 women (25%). In this group there were especially untrained women with a high incidence of "health complications" during pregnancy.