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Asian-Australas J Anim Sci > Volume 4(3); 1991 > Article
Animal Reproduction and Physiology
Asian-Australasian Journal of Animal Sciences 1991;4(3): 251-254.
DOI: https://doi.org/10.5713/ajas.1991.251    Published online September 1, 1991.
Cleavage of mouse oocyte after the injection of immobilized killed spermatozoa
K. Goto, A. Kinoshita, A. Kuroda, Y. Nakanishi, K. Ogawa
Immobilized (killed) mouse spermatozoa or sperm head were microinjected into mouse oocytes matured in vivo and cultured for 72h in vitro. When non-capacitated spermatozoon was injected, oocytes that developed to > 2-cell and > 4-cell was 27.8 (15/54) and 3.7% (2/54), respectively. When non-capacitated sperm head was injected, development to > 2-cell and > 4-cell was 21.3 (16/75) and 8.0% (6/75), respectively. When capacitated spermatozoon was injected, development to > 2-cell and > 4-cell was 21.4 (15/70) and 4.3% (3/70), respectively. When capacitated sperm head was injected, development to > 2-cell and > 4-cell was 29.9 (35/117) and 10.3% (12/117), respectively. In contrast, none developed beyond 4-cell in the sham-operated group. The results of this study demonstrated that mouse oocytes matured in vivo can undergo normal appearing cleavage to 4-cell stage by dead-sperm injection. Sperm treatment prior to injection did not affect the ability of mouse oocytes to cleave in vitro.
Keywords: Mouse; Oocyte; Sperm; Injection
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