Ethical issues: Though stem cell research seems a potential alternative to xenografting yet it also raises some social and ethical issues (Evans, 2005, p. 663-7). Stem cells obtained from the adult, umbilical cord or placenta are not debated as much as human embryonic stem cells (hESCs) because construction of hESCs requires destruction of human embryo. Hence hSECs technology raises question of rights of protection embryo.
Stem cells derived from the adult, umbilical cord or placenta are not subject to the same ethical debates as those surrounding hESCs because obtaining them does not rely on the destruction of human embryos. Ethical issues surrounding the use of adult, umbilical cord or placental stem cells are focused on the process of informed consent and whether or not these cells should be available as a commercial commodity. However, New Zealand has regulation over the use of human embryo in research. According to HART act human embryo has limited moral rights.
Conclusion: The study of stem cells will help us to understand the developmental processes and mechanism underlying many diseases. It seems to be a promising technology for the treatment of many clinical conditions such as cancer, foetal developmental abnormalities and many genetic disorders. It can also be proved a superior technology over xenotransplantation.
尽管干细胞研究的伦理问题：似乎是一个潜在的替代研究还提出了一些社会和伦理问题（伊万斯，2005，p. 663-7）。从获得成人干细胞，脐带或胎盘没有争议的人类胚胎干细胞（胚胎干细胞）一样，因为建设需要破坏人类胚胎的胚胎干细胞。因此HSECs技术提高胚胎的权利保护问题。
来自成人干细胞，脐带或胎盘不受同样的道德辩论周围的胚胎干细胞由于获得它们不依赖于对人类胚胎的破坏。周围的成人的伦理问题，脐带或胎盘干细胞主要集中在知情同意的过程，是否这些细胞可以作为一种商品。然而，新西兰已经在人类胚胎研究的使用规则。根据哈特的人类胚胎的道德权利法案的限制。
结论：干细胞的研究将有助于我们理解和机制的许多疾病的发展过程。这似乎是对诸如癌症等临床治疗的一种很有前途的技术，胎儿发育异常和许多遗传性疾病。它也可以被证明是一个卓越的技术在异种移植。
