1. Japan Society of Obstetrics and Gynecology (JSOG). Report on fertilization and embryo transfer in 2009. http://plaza.umin.ac.jp/~jsog-art/20121017data1.pdf . Accessed 29 Mar 2013, (Japanese).
2. Japan Ministry of Health, Labour and Welfare (JMHLW). Report on Birth Statistics 2011. http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai11/toukei03.html . Accessed 29 Mar 2013, (Japanese).
3. Centers for disease control and prevention. Assisted reproductive technology; success rates, national summary and fertility clinic reports 2009: percentages of transfers that resulted in live birth for ART cycles using fresh embryos from own eggs and ART cycles using fresh embryos from donor eggs, by age of woman. http://www.cdc.gov/art/ART2009/sect4_fig46-50.htm#f47 . Accessed 29 Mar 2013, (Japanese).
4. Japan Society of Obstetrics and Gynecology (JSOG). Guidelines on Embryo Donation for Reproductive Purposes 2004. http://www.jsog.or.jp/about_us/view/html/kaikoku/H16_4.html . Accessed 29 Mar 2013, (Japanese).
5. Japan Society for Reproductive Medicine (JSRM). Guidelines on ART using third-party gamete 2009. http://www.jsrm.or.jp/guideline-statem/guideline_2009_01.html . Accessed 29 Mar 2013, (Japanese).