Abstract
INVESTIGATIONS already published1,2 have made it clear that pregnancies cause an increased cell vitality in the mother organism, and that they can even bring about a not inconsiderable organ increase there. It has also been found that the pregnancies give rise to a heightening of resistance to injurious factors3. A similar heightening of resistance is produced by normal sexual functions. In earlier publications3 it has been shown how normal sexual functions in both sexes raise the resistance to a number of different toxic agents, as, for example, large repeated doses of activated ergosterine, different metal salts, alcohols, narcotics, paratyphus cultures, diphtheria toxin. The injurious factor most commonly used in my experiments was arsenic trioxide, and the most usual animals were white mice, though white rats and rabbits were also included in a number of experiments. All the animals received the complete basal diet. In most of the experiments the toxic agent was administered in proportion to the bodyweight, and in doses increasing daily until the animals died.
Published Version
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