Word: ovum
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...plea, in the A.M.A. Journal, for doctors to report extremely rare cases of leukemia in identical twins to medical groups involved in leukemia research. Purpose of the request: to learn more about hereditary factors in the disease by studying its effect on two humans coming from the same ovum...
Brother Ronald, a student at Worcester State Teachers College, heard that a man could get along with only one kidney, and offered one of his to Richard. Satisfied that the twins were indeed identical (from a single ovum), so that there seemed to be little or no danger of hostile antibodies developing, the surgeons agreed to operate...
...Sieve's report was a little too pat, his results too nearly perfect. In the first place, Dr. Sieve conceded that in experiments with mice he had had 60% failures. Next, he relied heavily on the theory that the ability of the male sperm to penetrate an ovum depends largely on the enzyme hyaluronidase, and argued that the hesperidin must counteract this enzyme. Actually, say physiologists, there is no proof that hyaluronidase is responsible for penetration of the ovum. Further, Dr. Sieve speculated that the hesperidin helps a layer of cells around the ovum to clump together and keep...
...first hours after conception. Last week, Dr. Hertig told the International and Fourth American Congress on Obstetrics and Gynecology, meeting in Manhattan, that he had succeeded in studying the youngest human yet: he had put under the microscope a specimen which was obtained only 60 hours after the ovum had been fertilized...
...hour embryo was a double-cell group (the fertilized ovum having just begun to divide) and was found in the Fallopian tube. In other cases, embryos four to four-and-a-half days old were found in the uterus. Presumably the youngest human yet observed would have descended to the uterus within...