人类胚胎干细胞的来源与伦理思考

人类胚胎干细胞研究的伦理问题较多，因此要思考胚胎干细胞的伦理问题。胚胎干细胞来源有四种：选择性流产的人类胚胎组织；治疗不孕症夫妇不需要的由体外受精产生的人类胚胎；由捐献者专门为研究所捐献的配子由体外受精产生的人类胚胎；由体细胞核移植技术将人体细胞核移植入人或动物的卵泡内产生人类胚胎或嵌合体胚胎。用不同胚胎来源研究干细胞产生的伦理问题不同，伦理的思考和结论也不同。

Ethical View in Human Stem Cell Research

There are four sources of Human Stem Cell: cadaveric fetal tissue, embryos remaining after infertility treatments, embryos made solely for research purposes using IVF, embryos made using somatic cell nuclear transfer into oocytes. Each source of material raises ethical questions as well as scientific, medical, and lagal ones.The resolution of these ethical and scientific issues depends to some degree on the sourcs of the stem cell. The ethical view has been expressed among the conclusions and recommendations.