الفهرس 
Cover PageOnly 14 pages are availabe for public view
 |  | from | 209 |  |  |
| | | from | 209 | | |
Abstract
Clinicocytogenetic, biochemical and hormonal changes were studied on 78 Holstein-Friesian cows that were divided into 5 groups (21 cows served as control group, 17 follicular cysts, 8 luteal cysts, 18 retained placenta and 14 freemartins). All affected groups recorded a significant high percentage of numerical and structural aberrations. Moreover, these aberrations also observed in sex chromosomes represented by: 59, XO; 60, XO and 61, XO. Chromosomal complement in addition to 60, XY which observed in 100% of freemartin heifers and centromeric attenuation in only one of sex chromosome in 100% of cows affected with cystsic ovarian disease. Regarding the biochemical and hormonal nitrations, serum phosphorus level showed marked decrease, while zinc showed marked increase in all groups. The follicular cysts group revealed significant increase in values oestradial 17-(3 and decrease in serum calcium, luteal cysts group showed marked increase in values of serum progesterone, albumin and triglyceriders. While in retained placenta group hypoproteinaemia and hypoglobulinaemia were observed whereas, the freemartins group recorded a significant decrease in progesterone, oestradiol!7-p, protein profile and lipogram while the marked increase was observed in serum calcium level. Serum cholesterol and HDL-cholesterol showed similar pattern as steroidogenic hormones in all groups. Other findings did not show any significant variation as compared with control.