Word: sperm
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...tube. If, en route, it meets a fresh and viable sperm, conception occurs, and the fertilized egg proceeds to the uterus for implantation in its wall and development into a baby. Soon after the egg is released, the automatic hormone mechanism sends another chemical messenger to the ovaries, telling them not to release any more ripe eggs-to guard against multiple or superimposed pregnancies. If there has been no fertilization, the uterus again gets ready to slough off its lining, and the cycle is repeated...
...uterine wall? Searle's Dr. Thomas P. Carney is searching for a chemical that will serve to activate the specific muscles involved. In his research with infertile women, St. Louis' Dr. William H. Masters noticed that some had cervical mu cus so hostile to sperm that it killed them almost on contact. In normal women, during their "safe" periods, the mucus is so sticky and viscous that it tends to smother spermatozoa. So two lines of research are being followed: 1) to keep a woman's cervical mucus viscous enough to block sperm, and 2) to identify...
...male contraceptive seems more remote. On a suggestion from Dr. Rock, who noted that sperm production is prevented by too high a temperature in the testicles, some men have immersed their scrota in water at 130°. Sperm reduction lasted for as long as a month, but did not become effective until at least two weeks after the treatment. The tech nique is not likely to catch on. Los Angeles' Dr. Edward T. Tyler found a male pill that knocked out the sperm after two or three weeks. Trouble was, the drug worked with prison volunteers...
Female hormones will also suppress a man's sperm production-the present pills do this-but they lower both libido and potency, along with more dangerous side effects. Vaccinating a woman against her husband's sperm, or vaccinating him against his own, has been investigated by Dr. Tyler's biologist brother Albert, with poor results...
...significance of these findings cannot yet be assessed fully," says the Buffalo group. There is no certainty that damage to chromosomes in blood cells is accompanied by similar damage in germ cells-sperm or ova. But the two kinds of damage have been shown to go together after excessive radiation, and the same may be true after repeated use of LSD. Blood specimens from patients who have "flipped" and become psychotic after LSD are now being sent to Buffalo to see whether the phenomenon is widespread...