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Pandey AK, Ghuman SPS, Dhaliwal GS, Honparkhe M, Phogat JB, Kumar S. Effects of preovulatory follicle size on estradiol concentrations, corpus luteum diameter, progesterone concentrations and subsequent pregnancy rate in buffalo cows (Bubalus bubalis). Theriogenology 2017; 107:57-62. [PMID: 29128702 DOI: 10.1016/j.theriogenology.2017.10.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 10/25/2017] [Accepted: 10/30/2017] [Indexed: 11/19/2022]
Abstract
The present study was undertaken to investigate the effects of preovulatory follicle (POF) size on estradiol concentrations, luteal profile (CL diameter and progesterone concentration) and subsequent pregnancy rate in Murrah buffalo cows. The buffalo cows (n = 49) were synchronized for estrus by two doses of PGF2α given 11 days apart. The buffalo cows were inseminated during standing estrus and again after 24 h. Ovaries were scanned at estrus and 24 h intervals until ovulation, thereafter on days 5, 12 and 16 post-ovulation to examine the POF and CL diameter. Size of POF at estrus was divided into three categories; I: 10 to ≤12; II: >12.0 to ≤14.0; III: >14.0-16.0 mm. Blood samples were collected for estradiol (on day of estrus) and progesterone concentration (on days 5, 12 and 16). The estradiol concentrations were greater (P < 0.05) in category II than category I with the greatest (P < 0.05) concentrations estimated in category III. A positive correlation (P < 0.05) between POF and progesterone concentration, CL diameter and progesterone concentration was observed on all sampling day. Pregnant buffalo cows exhibited greater (P < 0.05) plasma progesterone as compared with their non-pregnant counterpart. Greater pregnancy rates were observed with an increased size of POF (χ2 = 2.9, P > 0.05). It was concluded that the POFs having diameters between 12 and 16 mm are mature enough to be transformed into CL of such optimum diameter and can secrete optimum progesterone concentrations that can sustain the pregnancy in Murrah buffalo cows.
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Affiliation(s)
- A K Pandey
- Department of Veterinary Gynaecology and Obstetrics, COVS, GADVASU, Ludhiana 141004, Punjab, India.
| | - S P S Ghuman
- Department of Veterinary Gynaecology and Obstetrics, COVS, GADVASU, Ludhiana 141004, Punjab, India
| | - G S Dhaliwal
- Department of Veterinary Animal Husbandry and Extension Education, COVS, GADVASU, Ludhiana 141004, Punjab, India
| | - M Honparkhe
- Department of Veterinary Gynaecology and Obstetrics, COVS, GADVASU, Ludhiana 141004, Punjab, India
| | - J B Phogat
- Department of Veterinary Gynaecology and Obstetrics, COVS, LUVAS, Hisar 125004, Haryana, India
| | - S Kumar
- Department of Veterinary Gynaecology and Obstetrics, COVS, LUVAS, Hisar 125004, Haryana, India
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Karuppanasamy K, Sharma RK, Phulia SK, Jerome A, Kavya KM, Ghuman SPS, Kumar H, Singh I, Krishnaswamy N. Ovulatory and fertility response using modified Heatsynch and Ovsynch protocols in the anovular Murrah buffalo (Bubalus bubalis). Theriogenology 2017; 95:83-88. [PMID: 28460685 DOI: 10.1016/j.theriogenology.2017.02.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 02/25/2017] [Accepted: 02/27/2017] [Indexed: 11/25/2022]
Abstract
We studied the effect of modified Heatsynch and Ovsynch protocols on the ovulatory response (OR), estrus induction rate (EIR) and conception rate (CR) in the anovular postpartum Murrah buffalo (n = 35). In the modified Heatsynch protocol (Group I; n = 12), buffaloes were given two GnRH at 2 h interval on treatment day 0, PGF (PGF2α) on day 7 and estradiol (E2) 1 mg on day 8. Two FTAI were done at 20 h intervals after E2 administration. In the modified Ovsynch protocol (Group II; n = 15), GnRH was given on day 0, 7 and 16 with a PGF on day 14. Two FTAI were done; one at last GnRH and the other 20 h later. Group III served as untreated negative control (n = 8). During the treatment, ovarian changes were monitored by transrectal ultrasonography and plasma progesterone (P4) and E2. Administration of two GnRH at 2 h interval neither increased the OR nor strengthened the subsequent P4 priming. Interestingly, in group I, none of the buffalo ovulated to E2 though the EIR was 100% indicating the occurrence of behavioral, but not ovulatory estrus. Administration of GnRH 7 day prior to the commencement of Ovsynch protocol (Group II) did not improve the CR (21.4%), though the OR was 71.4%. No significant difference was found in the diameter of largest follicle between the ovulated and non-ovulated buffalo in response to GnRH suggesting that follicle of ≥9.5 mm is necessary but not sufficient to induce ovulation in the anovular buffalo. In both the protocols, the plasma P4 was higher on day 7 in those buffaloes that ovulated to GnRH. Buffaloes treated with modified Ovsynch regimens were 5.27 times more likely to become pregnant than modified Heatsynch protocol. It is concluded that modified Ovsynch protocol is superior to modified Heatsynch protocol in terms of OR and CR.
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Affiliation(s)
- K Karuppanasamy
- Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh 243122, India
| | - R K Sharma
- ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana 125001, India
| | - S K Phulia
- ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana 125001, India
| | - A Jerome
- ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana 125001, India.
| | - K M Kavya
- Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh 243122, India
| | - S P S Ghuman
- College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab 141004, India
| | - H Kumar
- Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh 243122, India
| | - I Singh
- ICAR-Central Institute for Research on Buffaloes, Hisar, Haryana 125001, India
| | - N Krishnaswamy
- Division of Animal Reproduction, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh 243122, India
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Ovulation synchronization with estradiol benzoate or GnRH in a timed artificial insemination protocol in buffalo cows and heifers during the nonbreeding season. Theriogenology 2017; 87:333-338. [DOI: 10.1016/j.theriogenology.2016.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 08/22/2016] [Accepted: 09/06/2016] [Indexed: 11/19/2022]
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Mirmahmoudi R, Souri M, Prakash B. Comparison of endocrine changes, timing of ovulations, ovarian follicular growth, and efficacy associated with Estradoublesynch and Heatsynch protocols in Murrah buffalo cows (Bubalus bubalis). Theriogenology 2014; 82:1012-20. [DOI: 10.1016/j.theriogenology.2014.07.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 07/15/2014] [Accepted: 07/15/2014] [Indexed: 11/29/2022]
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