Page 112 - BBLP ejournal2018.docx

วารสารเทคโนโลยีชีวภาพการผลิตปศุสัตว์

Effect of estrous synchronization on pregnancy rates in swamp buffaloes.

3/
1/
1/
Krisdakorn Pawong Sompit Ruk-ngam Apichai Poonchai Worawich Wara-aswapati
2/

Abstract
The objective of this study was to compare the effect of two estrus synchronization programs; CIDR-B
plus PGF 2α and Ovsynch on pregnancy rate in swamp buffaloes. One hundred and eight buffalo cows were divided

into two groups. CIDR-B group (n=53). CIDR-B were inserted into vagina for 10 days and 500 µg of PGF 2α was

injected 1 day before CIDR-B removal. Artificial insemination (AI.) was performed at 60 hr and 72 hr after CIDR-
B removal. In Ovsynch group (n=55), cows were injected with 10 µg GnRH on D0 and D9 then 500 µg of PGF 2α

was injected on D7. AI. was performed at 12 hr and 24 hr after 2nd GnRH injection. The result showed that
pregnancy rate in CIDR-B and Ovsynch groups were 20.75% (11/53) and 41.82% (23/55) respectively (p<0.05).

In conclusion, Ovsynch program was provided better result in pregnancy rates than CIDR-B program.

Keywords: estrous synchronization, swamp buffaloes, pregnancy rate

Registered No. : 57(1) - 0208– 024

1/ Nakornratchasima Insemination and Biotechnology Research Center, Bureau of Biotechnology in Livestock
Production
2/ Ratchaburi Boar Semen Production and Research Center, Bureau of Biotechnology in Livestock Production

3/ Regional Livestock 2 Office, Department of Livestock Development
nd

102