Word: sperm
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...that vitalists (who opposed mechanists) were always using the mystery of the process of fertilization to slip a soul into animals. In 1899, by chemical alterations in water containing sea urchin eggs, he was able to fertilize the eggs and cause them to develop into larvae without any male sperm at all. For this work he gained world renown. Professor Fleming's introduction recounts that maiden ladies stopped bathing at the sea shore for fear of what the water might do to them; barren couples earnestly entreated Loeb to provide them with children...
...also been confused with castration.* Sterilization, however, does not involve removal of any part of the sex glands or organs, and has no effect on physical capacity for intercourse. It simply makes it impossible for the woman's egg or the man's sperm to travel its normal pathway...
...legal abortion [Dec. 25]: When are we going to face the fact that human beings can no longer breed at the same level as animals? People should not be forced to become parents because of a blind biological collision between sperm and ovum, but should be free to choose whether or not they will undertake the obligations of parenthood...
...said that greater use of contraception techniques is the only acceptable way to halt population growth. "Speaking as a biologist," he said, "I see no reason not to keep the egg and the sperm separate. They are not human; they have no dignity...
...relatively simple operation in which a piece is cut out of the vas deferens, the duct through which male spermatozoa flow from the testes. It causes no change in the physiology of the sex act, merely ensuring that there is no sperm in the male ejaculation...