Word: embryos
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Dates: during 2000-2009
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...overblown rhetoric, not only for labeling the decision as a godsend but also for being too cavalier about procedures with legitimate ethical concerns. Stem cell advocates often make their case on the research’s life-saving potential, stressing the merit of destroying a five-day-old embryo to save a five-year-old girl. But this is an unfair comparison. Yes, the number of available stem cell lines will hopefully reach somewhere in the hundreds, but it will be 120 days before the NIH will even come up with new research guidelines, much less start doling out grants...
...concentration, simply put, is about how humans develop,” he added. “How does a fertilized egg turn into an embryo, turn into a fetus, turn into an adult...
...proper diagnosis.” The actress, author, and activist discussed the importance of awareness and early diagnosis and described the experience of finding out she had uterine cancer. She recalled, “I told my boyfriend, ‘we have to freeze an embryo!’ The doctor had me convinced I had 15 minutes of fertility left, and this with the boyfriend who’s 16 years younger. Needless to say, we’re no longer together.” Michael B. Hess ’09, the former treasurer of the Lampoon...
...gradually evolved into feet, for example. But fins and feet and other complex structures are also encoded in DNA, and until the 1980s, biologists had almost no knowledge of the genes that built them. Over the past 25 years, biologists have identified many of the genes that help build embryos. A number of them help lay out the embryo's blueprint by letting cells know where they are. The cells absorb proteins floating around them, and the signals trigger the cells to make other proteins, which in turn clamp onto certain bits of DNA to switch neighboring genes...
...success rates have increased, the average number of embryos transferred has gone down, from 3.9 in 1996 to 2.4 in 2005. Single-embryo transfers are now recommended in many cases; generally, the younger the patient, the likelier it is that an embryo will implant. A recent article in the journal Fertility and Sterility even suggested recasting how fertility clinics view outcomes: a singleton birth should be considered a success, triplets a failure...