Research can be on embryos.Logical formLearned from158 sentences. An embryo may undergo an implantation.Logical formLearned from157 sentences. Embryos can be hybrid.Logical formLearned from155 sentences. Thousands can be constituted-of-or-filled-with embryos.Logical formLearned from154 sentences. (Stem cells) can be from human embryos.Logical formLearned from151 sentences. (Stem cells) may be derived from embryos.Logical formLearned from148 sentences. Embryos can be discarded.Logical formLearned from146 sentences. (Stem cells) can be from embryos.Logical formLearned from145 sentences. Embryos can be vertebrate.Logical formLearned from143 sentences. (Stem cells) may be derived from human embryos.Logical formLearned from142 sentences. Research can be on human embryos.Logical formLearned from140 sentences. Embryos may be created.Logical formLearned from132 sentences. A status may pertain-to an embryo.Logical formLearned from128 sentences. Human embryos can be for research.Logical formLearned from127 sentences. Embryos may undergo a development.Logical formLearned from124 sentences.