Effect of food restriction on plasma fsh and timing of the new follicular wave emergence in cattle
Journal Title: INTERNATIONAL JOURNAL OF CURRENT RESEARCH - Year 2014, Vol 6, Issue 5
Abstract
Friesian cows were used to determine the effect of undernutritionon concentrations of the follicle stimulating hormone (FSH) in serum and emergence of new follicles after estradiol cypionate (ECP). Cows of G1 and a control group were fed on concentrated feed and dry clover while G2 was fed on hay only (restricted diet) for a period of 60 days before initiation of the treatment with ECP. After 60 days, cows of G1 and G2 were given 1 mg of ECP. On Day 0 (day to receive ECP),blood serum from all groups was collected at 12 hour interval for 3 days, and concentrations of FSH were quantified in blood serum. A well-defined increase and synchronization in FSH concentration was observed in G1.FSH concentrations were greater for G1 (0.86 mIU/ml) than for other groups. Emergence of a new wave of follicular development was observed 48 hours after beginning the study in G1 and contrasted with delayed emergence of a new follicular wave in the control group (48±24 hours). However, long-term feed deprivation decreased FSH concentrations in serum and absence emergence of new follicular waves.
Authors and Affiliations
Mohamed Ali
Keywords
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