Limits placed on embryo research.
D006291:Health Policy / Q000331:legislation & jurisprudence*; D006801:Humans; D009316:National Institutes of Health (U.S.); D012106:Research / Q000191:economics / Q000331:legislation & jurisprudence*; D012109:Research Support as Topic / Q000331:legislation & jurisprudence; D014481:United States