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Beef Improvement Federation activated patches became pregnant, as well as 65% of females with partially activated patches. These two groups represented females fully expressing estrus and those for which estrus was just beginning, respectively. Forty-five percent of females with nonactivated patches – those not expressing estrus — became pregnant. “What we saw was a big semen type by estrous expression interaction,” stated Perry, cautioning breeders that heat detection is important to success with sexed semen. “There definitely is a place for sexed semen and it is very practical to use. But it should be used in females showing estrus.” LT This article is reprinted with permission from www.BIFconference.com, Angus Media’s online coverage site of the 2019 Beef Improvement Federation Research Symposium and Annual Meeting. LIMOUSIN Today | 27