Efficacy of CIDR treatment against ovarian follicular cysts in cows

Mem.Fac.Agr. Kagoshima, 2004; 39:45-56The objectives of this study were to identify cows with follicular cysts and study the efficacy of CIDR (Progesterone=1.9g) treatment against ovarian follicular cysts in Japanese Black and Hoistein cows. Forty-one cows from Kagoshima Prefecture and Miyazaki Prefecture were initially identified by rectal palpation to have follicular cysts. These were randomly allocated into three groups where group 1 (n=29) were treated with CIDR for 7 days, group 2 (n=11) treated with CIDR for 14 days, and group 3 (n=1) as the control group where no CIDR was inserted. After removal of CIDR, all animals received an intramuscular injection of 25 mg PGF_. Fifteen out of 41 cows were confirmed to have follicular cysts after plasma progesterone determination by radioimmunoassay, as they had a pre-treatment progesterone concentration of1ng/ml) was 93.3% in both treated groups