Figure 1

Development of human parthenogenetic embryonic stem cells. (A) Immature oocytes; (B) Mature metaphase II oocytes; (C) Zygote with two pronuclei; (D) two-cell embryo; (E) eight-cell embryo; (F) Blastocyst; (G) Development from immature oocytes to human parthenogenetic embryonic stem cells. Bar is 50 μm.