Research on embryos.
D033041:Embryo Research; D004622:Embryo, Mammalian; D005260:Female; D030342:Genetic Diseases, Inborn; D005818:Genetic Engineering; D006801:Humans; D007315:Insemination, Artificial; D007883:Legislation, Medical; D008297:Male; D018587:Oocyte Donation; D018570:Risk Assessment; D006113:United Kingdom