Onset of estrus and preovulatory LH surge and ovulatory efficiency in sheep after short-term treatments with progestagen-sponges and progesterone-CIDRs

Este artículo se encuentra disponible en la página web de la revista en la siguiente URL: https://onlinelibrary.wiley.com/doi/abs/10.1111/rda.13317 Este es el pre-print del siguiente artículo: Martínez-Ros, P., Astiz, S., García-Roselló, E., Ríos-Abellán, A. & González-Bulnes, A. (2019). Onset of estrus and preovulatory LH surge and ovulatory efficiency in sheep after short-term treatments with progestagen-sponges and progesterone-CIDRs. Reproduction in Domestic Animals, vol. 54, n. 2 (feb.), pp. 408-411, que se ha publicado de forma definitiva en https://doi.org/10.1111/rda.13317 This is the pre-peer reviewed version of the following article: Martínez-Ros, P., Astiz, S., García-Roselló, E., Ríos-Abellán, A. & González-Bulnes, A. (2019). Onset of estrus and preovulatory LH surge and ovulatory efficiency in sheep after short-term treatments with progestagen-sponges and progesterone-CIDRs. Reproduction in Domestic Animals, vol. 54, n. 2 (feb.), pp. 408-411, which has been published in final form at https://doi.org/10.1111/rda.13317 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±4.0h after device withdrawal for sponges and CIDRs, respectively; p > .05) and preovulatory LH discharge (5.1 ± 2.1 and 5.8 ± 3.3h after onset of estrus behavior for sponges and CIDRs, respectively; p > .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. Preprint