October 5, 2007
Researchers Detour Around Stem-Cell Rules
Thwarted by regulations on egg donation for research, scientists craft new ways to manufacture embryos
James A. Byrne sits in a waiting room at the Stanford Fertility & Reproductive Medicine Center with an incubator next to him. At about 4 p.m., an embryologist hands Mr. Byrne three tubes, each containing a single egg freshly harvested from a young woman's ovaries.
These particular eggs are too immature for the in vitro fertilization procedure, but Mr. Byrne thinks they may
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