Researchers say embryos in labs are not available: stem cell conundrum.
Kolata
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G
D002460:Cell Line; D019924:Embryo Disposition / Q000706:statistics & numerical data*; D004622:Embryo, Mammalian / Q000166:cytology*; D005307:Fertilization in Vitro; D005328:Fetal Viability; D006801:Humans; D035845:Research Embryo Creation; D013234:Stem Cells; D014481:United States
Biomedical and Behavioral Research; Genetics and Reproduction; Popular Approach/Source