Cyclicity, estrus expression and pregnancy rates in beef heifers with different reproductive tract scores following progesterone supplementation.
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DOI: 10.1016/j.theriogenology.2020.01.028
Abstract: Two experiments were conducted to determine effects of progesterone (P4) on cyclicity, estrus expression rate (EER) and artificial insemination pregnancy rate (AIPR) in beef heifers with various reproductive tract scores (RTS; 1 to 5; 1,… read more here.
Keywords: pregnancy; age; treatment; beef heifers ... See more keywords
Comparison of the 7 & 7 Synch protocol and the 7-day CO-Synch + CIDR protocol among recipient beef cows in an embryo transfer program.
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DOI: 10.1016/j.theriogenology.2020.09.033
Abstract: An experiment was designed to evaluate the effectiveness of the recently developed 7 & 7 Synch protocol to synchronize estrus among recipients prior to embryo transfer (ET). Postpartum beef cows (n = 1358) across thirteen locations were… read more here.
Keywords: synch protocol; cidr; day; synch cidr ... See more keywords
PSXIII-12 Evaluation of split-time artificial insemination following administration of the 7-d CO-Synch + CIDR® estrus synchronization protocol in beef heifers
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DOI: 10.1093/jas/skz258.745
Abstract: Estrous response and pregnancy rates resulting from fixed-time (FTAI) or split-time (STAI) artificial insemination were compared among heifers following treatment with the 7-d CO-Synch + CIDR® (controlled internal drug release;1.38g progesterone) protocol. Heifers (n =… read more here.
Keywords: split time; time; protocol; synch cidr ... See more keywords