[article]
| Title : |
Effectiveness of duration of CIDR application on reproductive performance of postpartum anestrous dairy cows |
| Material Type: |
printed text |
| Authors: |
G. Gautam, Author ; B. B. Ratna, Author ; A. K. Sah, Author ; B. N. Devkota, Author |
| Publication Date: |
2020 |
| Article on page: |
145-150 p. |
| Languages : |
English (eng) |
| Keywords: |
Duration comparison, estrus expression, pregnancy, vaginal electrical resistance |
| Abstract: |
This study was done to compare the effectiveness of duration of Controlled Internal Drug Release (CIDR) application on
reproductive performance of postpartum anestrous dairy cows while applying CIDR-PG protocols. Cows (n=19) in a large
commercial dairy farm in Chitwan, Nepal that were not detected in estrus at least until 60 days postpartum were selected
and divided randomly into two treatment groups. The CIDR device containing 1.9 g progesterone was placed into the vagina
of cows for seven days (7-day group, n=10) and for 11 days (11-day group, n=9). One day before the removal of CIDR, all
the cows were treated with PGF2 alpha analogue (Cloprostenol 500 µg). Vaginal electrical resistance (VER) was measured
at 48 hours after CIDR removal. Cows were observed for estrus signs at least three times a day starting from the day of
CIDR removal until five days after that, and those detected in estrus were artificially inseminated (AI) according to am/pm
rule. Pregnancy was diagnosed 60 days after AI using trans-rectal palpation and ultra-sonography. Overall estrus expression
and pregnancy rates were 73.7% and 52.6%, respectively. Estrus expression rate within five days after CIDR removal was
higher (p
There was no effect of Body Conditioning Score (BCS), breed, ovarian status before treatment on estrus expression rate and
pregnancy outcome. There was a tendency (p
cows. Moreover, the pregnancy rate tended to be higher in cows with high VER than in cows with low VER. In conclusion,
while applying CIDR-PG protocol, application of CIDR for 7 days was more effective than for 11 days on inducing estrus in
postpartum anestrous cows while pregnancy rate was not different between two CIDR application durations. |
| Link for e-copy: |
https://afu.edu.np/jafu |
in Journal of Agriculture and Forestry University > Volume 3 (2019) . - 145-150 p.
[article] Effectiveness of duration of CIDR application on reproductive performance of postpartum anestrous dairy cows [printed text] / G. Gautam, Author ; B. B. Ratna, Author ; A. K. Sah, Author ; B. N. Devkota, Author . - 2020 . - 145-150 p. Languages : English ( eng) in Journal of Agriculture and Forestry University > Volume 3 (2019) . - 145-150 p.
| Keywords: |
Duration comparison, estrus expression, pregnancy, vaginal electrical resistance |
| Abstract: |
This study was done to compare the effectiveness of duration of Controlled Internal Drug Release (CIDR) application on
reproductive performance of postpartum anestrous dairy cows while applying CIDR-PG protocols. Cows (n=19) in a large
commercial dairy farm in Chitwan, Nepal that were not detected in estrus at least until 60 days postpartum were selected
and divided randomly into two treatment groups. The CIDR device containing 1.9 g progesterone was placed into the vagina
of cows for seven days (7-day group, n=10) and for 11 days (11-day group, n=9). One day before the removal of CIDR, all
the cows were treated with PGF2 alpha analogue (Cloprostenol 500 µg). Vaginal electrical resistance (VER) was measured
at 48 hours after CIDR removal. Cows were observed for estrus signs at least three times a day starting from the day of
CIDR removal until five days after that, and those detected in estrus were artificially inseminated (AI) according to am/pm
rule. Pregnancy was diagnosed 60 days after AI using trans-rectal palpation and ultra-sonography. Overall estrus expression
and pregnancy rates were 73.7% and 52.6%, respectively. Estrus expression rate within five days after CIDR removal was
higher (p
There was no effect of Body Conditioning Score (BCS), breed, ovarian status before treatment on estrus expression rate and
pregnancy outcome. There was a tendency (p
cows. Moreover, the pregnancy rate tended to be higher in cows with high VER than in cows with low VER. In conclusion,
while applying CIDR-PG protocol, application of CIDR for 7 days was more effective than for 11 days on inducing estrus in
postpartum anestrous cows while pregnancy rate was not different between two CIDR application durations. |
| Link for e-copy: |
https://afu.edu.np/jafu |
|
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