[Frequency of antiphospholipid antibodies and Leiden mutation of hemostasis Factor V in unexplained recurrent fetal and embryo loss].

Object of the study are women with a history of unexplained recurrent embryo, fetal and early neonatal death, severe preeclampsia, fetal growth retardation, abruptio placentae, puerperal thromboses. Quite often placental insufficiency is linked to abnormal vascular system and hemostatic disturbancies. In about 65% of the women with a complicated and in 18% of the women with a normal pregnancy are observed different genetic anomalies that lead to a hypercoagulative state.

[A method of determining dehydrogenase activity of human spermatozoa].

The authors present a quantitative method for the evaluation of biologic activity of human spermatozoa by determining their dehydrogenase activity by tetrazolium salts. The method is based on the property of these salts to change during biochemical reduction from colorless water soluble compounds into insoluble compounds in water compounds (phormazanes), which remain at the site of the reduction, e.g.