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is a Japan-born US based scientist. He has made numerous key contributions to the study of mammalian fertilization. He is a pioneer of assisted fertilization technologies such as in vitro fertilization and direct sperm injection into egg (commonly called intracytoplasmic sperm injection or ICSI) which are widely used today in human infertility clinics throughout the world. He was also a pioneer in the cloning field. In 1997 his laboratory at the University of Hawaiʻi at Mānoa successfully cloned mice using the Honolulu technique. The first one was a female named Cumulina from the cells that surround the developing ovarian follicle in mice. ==Early and later years== Yanagimachi was born in Sapporo, Japan.〔(Ryuzo Yanagimachi - Encyclopaedia Britannica )〕 He received a BS in zoology in 1952 and a DSc in animal embryology in 1960 from Hokkaido University. He then taught high school and junior college for two years because he could not find a research position.〔 Yanagimachi applied for a post-doctoral position with Dr. M. C. Chang of the Worcester Foundation for Experimental Biology in Shrewsbury, Massachusetts. He got this position and there discovered how to fertilize hamster eggs "in vitro." This work led to in vitro fertilization of eggs of human and other mammalian species. In 1964 he returned to Hokkaido University as a temporary lecturer with the possibility of later being appointed to an assistant professorship. However, another person eventually got the position.〔 In 1966 Yanagimachi ended up at the University of Hawaii as an assistant professor and has become a full professor of anatomy, biochemistry, physiology and reproductive biology at the John A. Burns School of Medicine. After working for 38 years at the university of Hawaii, he retired the end of 2004 to become a professor emeritus, but keeps working with junior fellows. He is married to Hiroko, a former child psychologist. She could not find work in her field when they came to the U.S. due to a language barrier, so she went to work with researchers in his lab as an electron microscopist.〔GINA KOLATA (July 24, 1988) (Man in the News; Pushing the Boundaries of Reproductive Biology ) New York Times〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ryuzo Yanagimachi」の詳細全文を読む スポンサード リンク
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