Stem cell decision time.
D004622:Embryo, Mammalian / Q000166:cytology*; D005060:Europe; D006078:Government Programs; D006801:Humans; D009316:National Institutes of Health (U.S.) / Q000331:legislation & jurisprudence; D012106:Research / Q000191:economics / Q000331:legislation & jurisprudence*; D012109:Research Support as Topic; D012926:Social Control, Formal; D013234:Stem Cells; D006113:United Kingdom; D014481:United States