On the issue of biological effects on pregnancy. The first message. The effect on pregnancy in rabbits of serum from non-castrated males.

Abstract

Research on the issue of artificial effects on pregnancy is conducted mainly in the direction of termination or prevention of pregnancy. With practical application in humans, these two issues are currently strictly separated. If, with regard to termination of pregnancy, it has been universally recognized as the only expedient method of surgical removal of the egg, then with regard to preventive measures against conception, it must be said that all the proposed methods do not give a permanent effect.

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