Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 9(12): 2027-2035
Http://dx.doi.org/10.17582/journal.aavs/2021/9.12.2027.2035
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Ahmed Saad A. Hassaneen1*, Ayman M. Ibrahim2, Nasra Ahmed M. Yousef1, Ahmed Ezzat Ahmed1, 3*

1Department of Theriogenology, Obstetrics and Artificial Insemination, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt; 2Veterinarian, Luxor Governorate, Egypt; 3Biology Department, Faculty of Science, King Khalid University, 61413 Abha, Saudi Arabia.

Abstract | This study aimed to determine whether combination of the controlled-internal drug releasing device (CIDR) within or before ovsynch protocols in acyclic postpartum buffaloes improves both the resumption of cyclicity and conception rate compared to ovsynch protocols only. Thirty-one clinically healthy female buffaloes (3-5 years-old; and 440.0± 10.0 kg b.wt) suffering from prolonged postpartum anestrous (3-9 months) were included. Buffaloes with any disorders that may directly or indirectly affect reproductive performance were excluded. Blood sampling was performed at these time-points; day -10, 0, 4, 7, and 9. Plasma progesterone and phosphorus (P) were assayed. Our results showed that the conception rate was significantly higher (P<0.05) in the GPG ovsynch-treated compared to the G-CIDR-PG but not the CIDR-GPG modified ovsynch-treated modified with conception rates of 57.1%, 30.0%, and 50.0 %respectively). This study found that, the P concentrations were significantly higher in the responsive compared to the non-responsive CIDR-GPG-modified ovsynch-treated group. This study concluded that GPG-ovsynch would be beneficial for synchronization in postpartum buffaloes. Moreover, CIDR-GPG likely improve the fertility, since the higher P levels can be utilized in activating the follicular dynamics.

Keywords | Anoestrus, Fertility, Gonadotropins, Progesterone-induced estrus.