Fig. 2From: Efficient production of pronuclear embryos in breeding and nonbreeding season for generating transgenic sheep overexpressing TLR4The production efficiency of in vivo pronuclear embryos in different seasons. a The rate of pronuclear embryo. b The rate of 2-cell. c The rate of transferable embryo. BS = Breeding Season, N = 43. NBS = Non-breeding Season, N = 37. Superscript letter (*) represents statistically significant difference (P < 0.05)Back to article page