E. Heinrich Kisch,
The sexual life of woman in its physiological…
“ More especially we are here concerned with external influences affecting unfavourably nutrition and innervation, and therewith also ovulation; also near kinship between the parties to the act of intercourse; and finally hereditary predisposition. In animals, captivity, exposure to cold, over-exertion, insufficient or unsuitable food, and inbreeding, have been proved to result in infertility. ”
