INVESTIGATIONS ASSOCIATED WITH THE TRANSPLANTATION OF BOVINE OVA

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Abstract
Recovery of ova was effected by slaughter of the donor and removal and flushing of the reproductive tract. A significantly greater percentage of ova were recovered from cows than from calves. Cow ova were fertilized at the rate of 61.49% while fertilization rate of calf ova was 23.6%. A significantly greater percentage of cows, not possessing corpora lutea at breeding, produced more fertilized ova than did cows possessing a "full-sized" corpus. The administration of stilboestrol to cows possessing "full-sized" corpus was observed to significantly increase the percentage of fertilized ova recovered from 14.29 to 66.6%. Also, the administration of stil-boestrol increased the percentage of fertilized ova recovered from calves, and permitted the collection of fertilized ova from pregnant cows.

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