The cover image shows Percentage of BrdU cells is decreased in embryos cultured in Ham’s F10 medium for 24 h. E3.5 embryos were cultured in KSOM+AA or Ham’s F10 for 24 h and then were tested for entrance into the cell cycle by BrdU incorporation. Part 1. BrdU incorporation into embryos cultured in (A) KSOM+AA or (D) Ham’s F10. (B, E) Hoechst stain for nuclei in (A, D), respectively. (C, F). Merge of BrdU stain and Hoechst stain in (A, D) and (B, E). (See Xie
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