TY  - JOUR
T1  - The Comparison of the Pregnancy Rates Obtained after the Ovsynch and Double Dose PGF<SUB>2&#945;</SUB> + GnRH Applications in Lactating Dairy Cows
AU - Dogruer, Gokhan AU - Saribay, Mustafa Kemal AU - Karaca, Fikret AU - Ergun, Yasar 
JO  - Journal of Animal and Veterinary Advances
VL  - 9
IS  - 4
SP  - 809
EP  - 813
PY  - 2010
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2010.809.813
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2010.809.813
KW  - Ovsynch
KW  -prostaglandin
KW  -timed artificial insemination
KW  -pregnancy
KW  -dairy
KW  -cow
KW  -Turkey
AB  - This study was carried out to compare the pregnancy rates in timed artificial inseminations after Ovsynch and PGF<SUB>2&#945;</SUB> + GnRH applications on lactating dairy cows. The research was conducted in a commercial dairy farm on 84 lactating Holstein cows which the ages were ranging between 3-5 years old and between 80-120 days postpartum. The cows were randomly assigned to two groups as Ovsynch (n = 42) and Prosta Glandin (PG) (n = 42). The cows in Ovsynch group recieved 10.5 &#956;g<SUP>-1</SUP> GnRH at day 0, 500 &#956;g<SUP>-1</SUP> PGF<SUB>2&#945;</SUB> at day 7 and 10.5 &#956;g<SUP>-1</SUP> GnRH at day 9 intramuscularly. The cows in PG group recieved 500 &#956;g<SUP>-1</SUP> PGF<SUB>2&#945;</SUB> two times with an interval of 14 days and 10.5 &#956;g<SUP>-1</SUP> GnRH intramuscularly 48 h after the second PGF<SUB>2&#945;</SUB> injection. Artificial inseminations were applied to the cows in both of the groups between 16-20 h after the GnRH injections. The pregnancy diagnosis was performed 30 days after the artificial inseminations by ultrasonography. The pregnancy rates were determined as 35.7% (15/42) in Ovsynch group and 47.6% (20/42) in PG group. Although, the pregnancy rate were higher in PG group than the Ovsynch group the differrence was not statistically important (p&gt;0.05). It was concluded that the programme consisted of 14 days interval double dose PGF<SUB>2&#945;</SUB> injections, GnRH applications 48 h following the second PGF<SUB>2&#945;</SUB> injection and timed artificial insemination 16-20 h after the GnRH injection could be an alternative to the Ovsynch programme in timed artificial inseminations.
ER  -