Comparison of intracytoplasmic sperm injection for inbred and hybrid mice

We compared the results of intracytoplasmic sperm injection (ICSI) that leads to full term development of hybrid (B6C3F1 and B6D2F1) and inbred (C57BL/6) mouse embryos. Although fertilization and pre‐implantation development of C57BL/6 eggs were similar to those of F1 hybrid eggs, post‐implantation development of the embryos from C57BL/6 females was significantly poorer than those of the eggs from hybrid females. Reciprocal crosses of C57BL/6 and B6C3F1 gametes revealed that the low rate of post‐implantation development of C57BL/6 embryos was due to oocyte factor(s), rather than the sperm factor. Mol. Reprod. Dev. 60: 74–78, 2001. © 2001 Wiley‐Liss, Inc.

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