Word: sperms
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Dates: during 1940-1949
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...Sperm Meets Egg. One important contributing factor in sterility. Dr. Hamblen claims, is the fact that few people understand even the mechanics of conception. Spermatozoa (self-propelled male germs), when deposited in the female cervix (neck of the uterus), swim into the uterine cavity, then up through the pencil-sized fallopian tubes...
Near the feathery upper end of the tubes, one sperm cell may be lucky enough to merge with an ovum or egg cell which has been discharged from the nearby ovaries. After this fortunate meeting, the fertilized egg then proceeds back through the tube into the uterus, and burrows into the uterine lining: baby is on its way. This process may be prevented by a number of disorders which occur about as often in husbands as in wives. Therefore Dr. Hamblen urges that men be examined as routinely as women...
...April 6, 1936). Last week Dr. Keith Roberts Porter of the Rockefeller Institute announced that he had produced a greater wonder: motherless tadpoles. He removed the nucleus from a frog's egg at the moment of fertilization, but before it could unite with the nucleus of the male sperm. This made the mother's contribution apparently a mere anonymous drop of protoplasm with no inheritable characteristics, while the sperm alone contributed a share of genes...
...book starts with a chapter on the origin of life. Eels, explains Dr. Levine, are not born from mud, nor caterpillars from leaves; like almost all other animals, they develop from the union of sperm cells and egg cells. Next comes the reproduction of fish and frogs, a barnyard view of chickens and cows. After the cow comes man. Dr. Levine bridges the gap with two pictures: a mother nursing her baby, a calf nuzzling at the udder...