ManageChatDiscover
354951

Effect of GnRH Administration at Mating and During Luteal Phase on Pregnancy Rate of Repeat Breeder Buffalo Cows

Article

Last updated: 03 Jan 2025

OverviewSimilar Items

Subjects

-

Tags

Animal production
Theriogenology / reproductive technology

Abstract

To evaluate the potentiality of GnRH agonist injection, on day 0,11 or 13 post-mating on pregnancy rate of repeat breeder buffalo cows, total of 40 cyclic Egyptian buffalo cows (4-7 years and 400-500Kg weight) were i.m. injected with 2.5ml PGF2α to synchronize estrus. Animals in heat (within 72h) were naturally mated and allotted randomly to four groups (10 in each). Animals in the 1st, 2nd and 3rd groups were i.m. injected with 205ml GnRH on day 0(G1),11(G2) and 13 (G3) of estrus onset, respectively, while G4 control injected with 2.5 ml saline. Blood samples were collected from jugular vein on day 0, 3, 5, 7,9, 11. 13.15 17 19, 21, 23 and 25 of estrus. Pregnancy was diagnosed day 25 post-mating of each animal using ultrasound examination. Results showed that serum P4 concentration increased (P<0.05) following GnRH injection up to day 13,17 and 25 day post-mating in G1, G2 and G3 as compared to G4, respectively. Serum P4 was the highest (P<0.05) in G3 from day 17 to 25 post mating, being different (P<0.05) from G4, but dud not differ than that in G1 and G2. Pregnancy rat was 70,70,80 and 50% in G1, G2, G3 and G4, respectively (P<0.05). Concentration of P4 was higher (P<0 05) in pregnant than in non-pregnant buffalo as overall mean for all groups or within each experimental group, being the highest in G3. Therefore, this study may conclude that injection of GnRH analogue (2.5 ml Receptal/animal) on day 13 post-mating improved serum progesterone concentration and pregnancy rate of repeat breeder buffalo cows as overall mean for all groups or within each experimental group compared to those injected on day 0 or 11 post-mating.

DOI

10.21608/vmjg.2017.354951

Keywords

Buffalo, repeat breeder, GnRH, estrous, Luteal phase, progesterone, Pregnancy

Authors

First Name

M.A

Last Name

Abo-Farw

MiddleName

-

Affiliation

Animal Production Research Institute, Agricultural Research Center, Giza, Egypt

Email

-

City

-

Orcid

-

First Name

M.M

Last Name

Ghoneim

MiddleName

-

Affiliation

Animal Production Research Institute, Agricultural Research Center, Giza, Egypt

Email

-

City

-

Orcid

-

Volume

63

Article Issue

1

Related Issue

47592

Issue Date

2017-01-01

Receive Date

2024-05-17

Publish Date

2017-01-01

Page Start

65

Page End

74

Print ISSN

1110-1423

Online ISSN

2537-1045

Article File

VMJG_Volume 63_Issue 1_Pages 65-74.pdf

PDF . 6.3MB

Link

https://vmjg.journals.ekb.eg/article_354951.html

Detail API

https://vmjg.journals.ekb.eg/service?article_code=354951

Order

354,951

Type

Original Article

Type Code

544

Publication Type

Journal

Publication Title

Veterinary Medical Journal (Giza)

Publication Link

https://vmjg.journals.ekb.eg/

MainTitle

Effect of GnRH Administration at Mating and During Luteal Phase on Pregnancy Rate of Repeat Breeder Buffalo Cows

Details

Type

Article

Created At

23 Dec 2024