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The present study supports that short-term (7-days) protocols based on progestagen-impregnated sponges and progesterone-loaded CIDRs are equally effective to induce ovulatory response in sheep. There were no significant differences in… Click to show full abstract
The present study supports that short-term (7-days) protocols based on progestagen-impregnated sponges and progesterone-loaded CIDRs are equally effective to induce ovulatory response in sheep. There were no significant differences in the onset of estrus behavior (32.0 ± 6.0 and 33.8 ± 4.0 hr after device withdrawal for sponges and CIDRs, respectively; p > 0.05) and preovulatory LH discharge (5.1 ± 2.1 and 5.8 ± 3.3 hr after onset of estrus behavior for sponges and CIDRs, respectively; p > 0.05). These features are similar to previously described for classical long-term (12-14 days) treatments. Hence, short-term CIDR-based protocols may be implemented using the same time-intervals for insemination than sponge-based and long-term protocols.
Journal Title: Reproduction in Domestic Animals
Year Published: 2019
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