Word: embryos
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Dates: during 2000-2009
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...Single-embryo transfers are now the name of the game in many cases. A recent article in the journal Fertility and Sterility generated controversy when it suggested recasting how fertility clinics view outcomes. A singleton birth should be considered a success, triplets a failure...
Just about the time that eight babies began growing inside a California woman's womb, some nationwide policies about fertility treatment were being codified. In June, the American Society for Reproductive Medicine (ASRM) issued updated "Guidelines on Number of Embryos Transferred." Women under age 35 - the octuplets' mom is reportedly 33 - should attempt to transfer no more than two, and preferably only one, fertilized embryo at a time. Women over age 40 should attempt no more than five. (See pictures of multiple births...
...Richard Paulson, director of the fertility program at the University of Southern California, helped write the original professional recommendations regarding embryo transfer. Although he decries the birth of triplets, he's irritated at calls to legislate assisted reproduction. Doctors aren't the problem, he contends; laws are. Some European countries limit the number of embryos transferred, but that doesn't allow for physicians to take into account individual medical histories; generally, the older the patient, the less likely embryos will implant...
...will continue to counsel patients that one embryo is the way to go," says Copland. "What does Mother Nature usually give us? One baby at a time...
...cells, switching one type of adult pancreatic cell, which does not produce insulin, to a type that does - without using stem cells at all. Why, he thought, do we need to erase a mature cell's entire genetic memory? If it's possible to reprogram cells back to the embryo, wouldn't it be more efficient in some cases to go back only part of the way and simply give them an extreme makeover? Using mouse cells, Melton did just that, creating the insulin-producing pancreatic cells known as islets. "The idea now is that you can view all cells...