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Can I read Effects of Two Protocols of Ovulation Synchronization on Corpus Luteum Size and Blood Flow, Progesterone Concentration, and Pregnancy Rate in Beef Heifers on EtoBox?
Effects of Two Protocols of Ovulation Synchronization on Corpus Luteum Size and Blood Flow, Progesterone Concentration, and Pregnancy Rate in Beef Heifers by Pablo Sebastián Reineri; Sergio Daniel Roldán Bernhard; Santiago Alberto Principi; Gustavo Daniel Gerlero; Juan Florencio Aller is a Medicine article available to read on EtoBox.
What is Effects of Two Protocols of Ovulation Synchronization on Corpus Luteum Size and Blood Flow, Progesterone Concentration, and Pregnancy Rate in Beef Heifers about?
The objective of this study was to evaluate the effect of 7-day estradiol-progesterone-based [Treat (C) ] and 5-day Co-Synch plus progesterone [Treat (Co-Sy) ] protocols on ovulation time, preovulatory follicle diameter, corpus luteum (CL) size and blood flow, progesterone (P4) concentration and pregnancy rate (PR) in beef heifers. In Experiment 1, a crossover design was applied (n = 9). For Treat (C) , a progesterone intravaginal (PI) device was inserted, plus 2 mg of estradiol benzoate (day 0). On day 7, 500 μg of cloprostenol plus 0.5 mg of estradiol cypionate were administered, and PI was removed. For Treat (Co-Sy) , on day 0, a PI was inserted plus 100 μg gonadotropin-releasing hormone (GnRH). On day 5, PI was removed, plus 500 μg of cloprostenol and 100 μg of GnRH were administered at 69-70 h later. From day one to ovulation day, dominant follicle was evaluated by ultrasonography. On days 4 and 8 post-ovulation, CL was evaluated by color Doppler, and P4 concentration was determined by chemiluminescence. In Experiment 2, a split-plot experimental design was used. Protocols followed were the same as in Experiment 1 [Treat (C) ; n = 310 and Treat (Co-Sy) ; n = 314]. Heifers wer
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- Author
- Pablo Sebastián Reineri; Sergio Daniel Roldán Bernhard; Santiago Alberto Principi; Gustavo Daniel Gerlero; Juan Florencio Aller
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Medicine (Life Sciences)