Word: ovum
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Dates: during 1960-1969
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...concern was to help subfertile couples to have normal babies. Now he has come to believe, as have other embryologists and physiologists, that an unusually high incidence of abnormal births may result from couples' using the rhythm method for birth control and miscalculating the date of ovulation. An ovum may remain fertile for at least two days, and sperm for about 36 hours. Cross says that in the first half of the ovulation cycle, a stale sperm may fertilize a normal egg, and in the second half, a normal sperm may fertilize a stale egg. Either way, he believes...
...woman to have 46 chromo somes per cell: 22 pairs of autosomes, which determine countless characteristics other than sex, and two gonosomes or sex chromosomes. In the female, these are a pair of Xs; in the male, an X and a Y (see diagram). When a sperm fertilizes an ovum, each supplies half the 46 chromosomes for the combination of cells that will grow into a baby. If the sperm contains an X chromosome, the baby gets that X plus one from the mother, and will be an XX girl. If the sperm contains a Y chromosome, the baby gets...
...months to years before the respiratory and vasomotor centers fail. At the same time one can share Schreiner's (1966, p. 100) disconent and insist that "a coordinating vital principle exists which is either there or not there." This vital principle comes into being when the sperm fertilizes the ovum and persists until life no longer is present. The moment of death can only be approximated...
...lining (endometrium). This accomplished, her complex hormonal system sends a messenger chemical to her ovaries, telling them to ripen one of the 50,000 or more potential egg cells with which she was born. Usually, only one ovary responds, and on Day 10 or soon after, a fully formed ovum is released into the Fallopian tube. The ovum takes three or four days to work its way down
...Good morning!" says a raw egg, lolling in a shallow dish, its yolk bearing an advertisement for a no-pressure printing technique, proving that the ovum can become a commercial. Noses nudge knowingly from a page dealing with psephology. Five pages of pebbled and scaly abstract photography resolve themselves into a closeup of human toes to make the point: "The wheel is an extension of the foot." One entire spread is printed in Leonardo-like "mirror writing," and another is set upside down just to show how absurd the whole concept of books can be. Indeed, the authors of this...