4Knoche JW. Health concerns and ethical considerations regarding international surrogacy [ J]. Int J Gynaecol Obstet,2014,126(2):183 -186.
5Purewal S, Crawshaw M, van den Akker O. Completing the surrogate motherhood process: parental order reporters' atti- tudes towards surrogacy arrangements, role ambiguity and role conflict [ J 1. Hum Fertil (Camb) ,2012,15 (2) :94 - 99.
9Koudstaal J, Braat DD, Bruinse HW, et al. Obsteric outcome of singleton pregnancies after IVF:a matched control study in four Dutch university hospitals [ J ]. Hum Reprod, 2000, 15(8) :1 819 - 1 825.
10Tonkens R. Why should we discard all abandoned human embryos ? [ J ]. Fertil Steril, 2013,100 ( 4 ) : e28.
