Abstract
Synchronized ewes (n = 217) were bred by laparoscopic insemination of frozen-thawed semen from 1 of 3 rams. The ewes were bred by either a double (110 ewes) or single horn (107 ewes) technique without regard to the site of ovulation. There was no difference in the percentage of ewes pregnant to either the single or double horn breeding technique. There was a significant effect of sire, with 1 ram producing a higher pregnancy rate in the ewes and 1 ram producing a significantly lower pregnancy rate when compared to the total pregnancy rate for all the ewes (P < 0.05). Thus, the single horn breeding technique is presented as an alternative technique for use in the commercial breeding of ewes by laparoscopic insemination of frozen-thawed semen.
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