A total of 35 crossbred goats were used to evaluate the effect of oFSH dosages on ovarian responses during superovulation. CIDR was inserted for 10-15 days and were divided into 3 groups, namely Groups M,, M2 and S receiving 8.8 mg and 14.08 mg of oFSH through multiple intramuscular (i.m.) injection starting from 2 days before the CIDR removal and 8.8 mg of oFSH through single i.m. injection up...

We determined the effects of hCG on ovarian response, concentration of progesterone, and fertility in a fixed-time AI (TAI) protocol. Four hundred forty-four crossbred beef heifers were synchronized with the CO-Synch + CIDR (controlled internal drug-releasing insert) protocol. In addition, heifers were randomly assigned to 1 of 4 treatments in a 2 × 2 factorial arrangement of treatments with ma...

Embryonic mortality after embryo transfer causes substantial economic losses in the cattle industry. This has been related to the inability of the corpus luteum (CL) to secrete enough progesterone (P4) to prepare the endometrium for embryo implantation and maintain pregnancy. Thus, the objective of this experiment was to evaluate the effects of treatments that induce ovulation of a persistent f...

Abstract An estrous-detection patch was used to determine the optimum timing for STAI and necessity of GnRH at on a 7-day CO-Synch+CIDR protocol. Crossbred beef cows (n=216) were stratified into following treatment groups: CTRL=TAI (n=67) 72 h post CIDR removal, or TRT=STAI (n=149) 84 removal. All females received (100 mcg) plus d0, PGF2α, an Estrotect estrous-detector d7. At post-CIDR score as...

 Though conception rates within 2 weeks of Eazi-BrEEd CIDR removal were lower for treated cows (27.7% vs 36.2% for controls, P < 0.083), overall pregnancy rates did not differ between treatment groups (P = 0.32). [Conception can be reduced by: 1) an older, unknown-aged egg being ovulated after an extended progesterone period; 2) vaginitis, so cleanliness and proper insertion technique are impo...

Ghezel sheep is one of the main breeds in the north-west of Iran which is reared for meat, milk and wool production. Improving reproduction of this breed will have a significant impact on the economic development of local farmers. Therefore, in the present study the effect of simultaneous use of estrus synchronization(controlled internal drug releasing (CIDR) and equine chorionic gonadotropin (...

AIM The study was conducted to determine the serum levels of certain hormones in post-partum anestrus cows following treatment with controlled internal drug release (CIDR) and Ovsynch protocol. MATERIALS AND METHODS A total of 30 postpartum anestrus cows were divided into three equal groups after thorough gynecoclinical examination. The Group 1 animals received an intravaginal progesterone de...