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In vitro fertilization (IVF) is one of the most important techniques used for assisted reproduction in mouse colony management. As with natural mating, where mice have varying fertility indices, fertility rates of genetically modified (GM) [transgenic (Tg), knock out (KO) and congenic (Cg)] mice are influenced by their genetic background. Lines of GM mice that have poor fertility have a concomitant...
In an attempt to optimize a method of cryopreserving spermazoa from mice bearing mutations, we investigated the effect on motility of temperature for the collection of mouse sperm and the rate of thawing after freezing. Comparison among samples of sperm collected from both the caudae epididymides and vas deferens placed directly in a cryoprotectant of 3% skim milk and 18% raffinose equilibrated at...
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