Word: spermatozoa
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...Researchers at the State University of Iowa seem to have found the perfect contraceptive-for rats. While they were fed nitrofuran compounds (chemicals obtained from oat hulls), male rats produced no spermatozoa, Dr. Warren 0. Nelson reported, but later they recovered their fertility and sired normal young. The University of Texas' Dr. Donald Duncan, edging out on a limb, said nitrofuran "could be the [human] contraceptive of the future...
...many cases of failure to conceive, said Rio de Janeiro's Dr. Arthur Campos da Paz, the trouble is that cervical secretions are hostile to spermatozoa. This can be established by a simple smear test. If the secretion is normally receptive, it dries in a marked, fernlike pattern; if it is hostile, the pattern is different or absent. And in such cases, doses of a female hormone may fix things...
Father Luyet's modest report of his work furthered some extravagant speculation. Perhaps men might be put into deep-freeze and revived thousands of years later. At the very least, spermatozoa from exceptional males could Le saved to fertilize females of the future. Unconcerned with such lurid prophecies, Biologist Luyet went on with his experiment...
...week's meeting also heard that a few of their colleagues had all but solved one of the biggest problems in artificial insemination: the preservation of sperm over long periods. Frozen in a solution of glycerin (which acts as a cushion, preventing ice crystals from destroying cell life), spermatozoa from rabbits and poultry have already been preserved for as long as 33 days. "We have ... to contemplate," said Dr. A. S. Parkes of London's National Institute for Medical Research, "the possibility of an animal begetting progeny long after its death . . . We have also to realize that...
...Vitamins and hormones generally have no value in increasing fertility*; the only measures Dr. Farris recommends (though many doctors differ) are X-ray treatments of the pituitary gland to stimulate production of spermatozoa...