Word: sperms
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Dates: during 1940-1949
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Sterility. Atomic radiation has a known effect on reproductive organs. How damaging was The Bomb? Months after it fell, Japanese doctors examined the sperm of 124 Hiroshima men, found one-third of them sterile. The explosion had produced sterility up to three miles from the target center. Two-thirds of the women exposed to The Bomb's atomic radiation suffered interference with menstruation; some who were pregnant had miscarriages...
...Washington's Walter Reed Hospital, a young G.I. arrived from Guadalcanal with such a cancer. Dr. Friedman found, to his astonishment, that the soldier's sperm had become fertilized; by a kind of parthenogenesis (virgin birth), without female ova, the cancer had produced tumors resembling embryos, containing bits of placenta, lung, bone...
Among the causes of male "sterility" (i.e., subnormal sperm production): mumps (after puberty), gonorrhea, malaria, hot baths, exposure to X rays and other atomic radiation. The chief cause of female sterility is blocked tubes. But contrary to popular notion, absolute sterility is rare. Failure to conceive is often due to fatigue, overweight, nervous strain, emotional tension between husband & wife, or simply too infrequent sexual relations. On more than one occasion, the Cleveland doctors have even discovered patients who were more innocent than Adam...
...repoduction of mammals, roughly half of a male's sperm contains X chromosomes which produce female offspring, and half contains Y chromosomes, producing males. Whether the offspring is male or female is determined by which kind of sperm unites with a female's egg. If scientists could separate the male-and female-producing spem, sex control would be easy...
Harvey reasoned that since female-producing sperm seems to contain slightly more chromatin (chromosome material), it must be slightly heavier. The problem, therefore, is to separate "biological isotopes." Harvey, citing a centrifuge method which has separated the light and heavy parts of sea urchins' eggs, thinks it can be done. His proposal: use a special centrifuge to whirl the sperm; the lighter male-producing sperm will rise to the top, can be skimmed off and planted by artificial insemination...