Investigation of Right and Left Ovary's Size and Weight and Comparison of Serums Concentration of Glucose, Urea and Cholesterol and Different Sized Follicles Fluid in Hybrid Cow in Khuzestan Province

The main prerequisite to improve fertility and reproduction status in cow, is to get sufficient knowledge on their ovary. Ovaries follicular functions play fundamental role in reproduction cycle, ovulation and conception. The main objective for the present study is to evaluate right / left ovaries size and weight and at the same time to compare concentrations of ovary glucose, urea and follicular fluid cholesterol in different sized follicles and hybrid cows serum. Serum and ovaries taken from twenty slaughtered cows were studied. Caliper was used to measure length, width and thickness of right and left ovaries. Follicular fluid was extracted from three small (3 to 5 mm), medium (6 to 9 mm) and large (up to 10 mm). Weight and length of right ovary was significantly much than those for left one (P<0.05), however width and thickness of right ovary did not differed from those in left one significantly. Concentrations of cholesterol, glucose and urea in follicular fluids as well as serum were determined. Results showed that concentrations of cholesterol, glucose and urea in serum (P<0.05) was much more than those in large, medium and small follicles significantly. Large follicles exhibited higher glucose concentration (P<0.05) than medium and small follicles, however, small and medium follicles did not varied significantly. As follicle size increased, urea level was declined accordingly. Small follicles showed much cholesterol concentration (P<0.05) than that in large and medium ones, however large and medium follicles did not varied significantly. As a whole, results revealed that weight and size of right and left ovaries vary in studied cows in this study, right ovaries were more active than left ones. Within a given biochemical medium, ovary's follicles are developed and matured, suggesting that it is associated to serum glucose variation. As follicles enlarged, urea and cholesterol levels were declined significantly.