Word: sperms
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Dates: during 1930-1939
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Hybrid corn is the result of inbreeding various strains for several generations, then crossbreeding. Corn, like mice, mackerel and men, reproduces by means of male sperm and female eggs. The sperm is produced and dispersed from the tassels at the top of the stalk; the eggs lurk at the base of the silk on each ear. In ordinary "open-pollinated" corn, fertilization occurs at random, the sperm-bearing pollen being carried to the silk by the wind. For inbreeding, the tassels and silk are protected by paper bags until maturity, and the plants are then self-pollinated by hand. These...
...bushy-thatched Dr. Gregory Goodwin Pincus, formerly of Harvard, now of Clark University (Worcester, Mass.) Some years ago Dr. Pincus accomplished the first fertilization of mammalian ova in vitro-a polite way of saying that conception took place in a glass vessel. He took ova from a doe rabbit, sperm from a buck, mixed them in a culture flask, implanted the fertilized ova in another doe which, at term, produced a fine litter (TIME, March 12, 1934). Since then the scientist has been able, by skillful coddling, to keep fertilized ova alive for ten days in vitro before implantation...
...Users of alcohol produce better babies than teetotalers (alcohol kills the weaker sperm...
...Many plants are cross-fertilized, but by wind-borne or insect-borne pollen-the equivalent of sperm in men and animals...
...Miller tells his patient: "1) Ovulation occurs 14 days before the following menstruation; 2) the egg cell can be fertilized only during the twelve-hour period immediately following its emergence from the [ovary]; 3) the fertilizing ability of the sperm cell in the female genital tract is maintained for not more than 24 to 36 hours." From those biological facts and the woman's record of her longest period Dr. Miller marks a calendar by which she and her husband may guide themselves. As an added precaution he advises continence two days before and two days after ovulation, thus...