Figure 1From: The oxidative stress adaptor p66Shc is required for permanent embryo arrest in vitroAppearance of 2–4 cell arrested embryos at day-8 post insemination. Morphological appearance of day-8 in vitro produced bovine embryos. Embryos at this time after in vitro fertilization usually reached the blastocyst stage (a), while arrested embryos still appeared as morphologically normal 2–4 cell embryos (b). (Magnification: 400×).Back to article page