Word: embryos
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Dates: during 1990-1990
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Researchers have long known that certain poisons can produce so-called dominant lethal effects in men. In these cases, the sperm is so damaged that it fails either to fertilize the egg or to produce a viable embryo. But little was known about whether toxins could trigger more insidious defects in the sperm -- problems subtle enough to allow the birth of the child but still harmful enough to produce serious malformations. Perhaps the most disturbing recent report concerns lead, which had been shown to impair fetal growth when mothers were exposed while pregnant. At a meeting last month...
Johnson, however, is biologically unrelated to the Calverts' baby, who was conceived by joining Mark's sperm and Crispina's egg in a Petri dish. (Crispina was unable to carry a baby because of a partial hysterectomy.) The fertilized embryo was implanted in Johnson's uterus last January...
...anyone who observes the brio of these rehearsals, as well as the total lack of temperamental combustion, it seems clear that there is the embryo of a new troupe here. For dance fans the notion is very attractive. Things are stale now in both ballet and modern dance. The prolific Morris -- who says, "I can make up a thousand steps; my problem is deciding what to keep" -- has shown an affinity for classical movement. It could be a dream linking. Baryshnikov, however, doesn't think a White Oak Company is in the cards. Speaking of dancers in the group...
...Louis Comfort Tiffany threw a party for himself to celebrate his 68th birthday. "When the savage searches for the gems from the earth or the pearls from the sea to decorate his person," Tiffany told several hundred guests at his lavish studio, "he becomes an artist in embryo." That idea informs $ nearly all Tiffany's prodigious output. As decorator, craftsman and glassmaker, he fretted over his place in history. Was he embryo or master? Artisan or artist...
Many prospective parents would love to choose the sex of their child. That is now possible, according to a report last week in Nature. But the technique, developed by Dr. Alan Handyside at Hammersmith Hospital in London, is far from simple. It involves creating several test-tube embryos outside the mother's womb through in vitro fertilization. Handyside's team found a way to determine the sex of embryos that are only a few days old by analyzing their genetic material. An embryo of the desired sex can then be implanted in the womb and the other embryos discarded...