Abstract
Enucleated mouse oocytes were successfully fertilized in vitro, and the resultant androgenetic eggs developed to the blastocyst stage. The proportion of enucleated oocytes fertilized in vitro was high (87-99%) at sperm concentrations ranging from 10-100 x 10(4)/ml. At high sperm concentrations (100-1,000 x 10(4)), 35-45% of the fertilized eggs resulted in heterozygous bispermic androgenones. The proportion of hemizygous haploid and heterozygous diploid androgenones developing to blastocysts was 11% and 43%, respectively. Hemizygous diploidization, however, showed no positive effect on development. These results clearly show that the procedure reported here is efficient and reliable for the production of androgenetic eggs.
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