Analysis of Germ Cell Function using In Vitro Fertilization

1-All mice were 8�C9 weeks of age.2-Numbers in parentheses represent the percentage of 2-cell embryos as a function of the number of oocytes fertilized3-Embryos were transferred at the 2-cell stage for all IVF experiments. Embryos were transferred to pseudo-pregnant mothers for some but not all IVF experiments.4-The number in parentheses represents the percentage of live birth as a function of the number of embryos transferred.