The chromosome pattern of embryos derived from tripronuclear zygotes studied by cytogenetic analysis and fluorescence in situ hybridization**Presented at the Conjoint Meeting of The American Fertility Society and the Canadian Fertility and Andrology Society, Montreal, Quebec, Canada, October 11 to 14, 1993.††Supported by grant 83–1069 from the British Columbia Health Care Research Foundation, Vancouver, British Columbia, Canada.