Word: sperms
(lookup in dictionary)
(lookup stats)
Dates: during 1930-1939
Sort By: most recent first
(reverse)
...chromosome, it is a girl. Thus Professor Crew reasoned the shorter life expectancy of the male seems to be carried on a gene or genes in the y-chromosome. By delicate manipulations, geneticists have had some success in separating male and female elements in mammalian sperm, opening the prospect of sex control in human reproduction-provided the parents will submit to artificial insemination by sperm from which one element or the other has been removed...
...Department of Agriculture station in Beltsville, Md.: Chief Piebe Ormsby Burke and Double Gerber Colantha Hero, both renowned for transmitting high milk and butterfat productivity to their female offspring. Last July an attache of the Argentine Embassy in Washington approached Roy Ralph Graves of the Beltsville station, proposed that sperm from the two bulls be bottled and shipped to Argentina...
...Graves turned the problem of preserving the vitality of the sperm during shipment over to his crack veterinarian, Dr. Fred W. Miller. From the bulls Dr. Miller extracted semen containing 1,000,000,000 spermatozoa, mixed the fluid with an equal amount of sugar solution, chilled the tubes to 34° F. (spermatozoa kept in warm temperatures lash their tails until they get tired, die). Next he buried the tubes in diatomaceous earth, a good insulator, packaged the whole in a buttermilk container...
...years ago Harvard's Physiologist Gregory Goodwin Pincus placed a rabbit's ova in a bottle with a rabbit's sperm, shook them together for 20 minutes. Next he placed the fertilized ova in the fallopian tube of a rabbit doe who 33 days later bore a litter of six healthy bunnies. They were no kin to her. She was simply their host-mother (TIME, March...
Last year Dr. Pincus fertilized rabbit ova with rabbit sperm in the same way, tried to make the ova develop in glass containers. That ectogenic experiment failed...