Folliculogenesis in the sheep as influenced by breed, season and oestrous cycle

Oestradiol levels in sheep plasma during the oestrous cycle.

The concentration of oestradiol was measured by radioimmunoassay in ovarian venous plasma collected from ewes of three breeds (Finnish Landrace, Scottish Blackface and Tasmanian Merino) on Day 9 of the oestrous cycle and in jugular venous plasma collected daily around oestrus in two of these breeds. The mean +/- s.e.m. concentration in the ovarian venous plasma of the Merino (44.1 +/- 7.6 pg/ml...

Follicular dynamics throughout the oestrous cycle in sheep. A review.

Whatever the stage of the cycle, follicles of various sizes are apparent on the surface of the ovary of sheep. No evidence of waves of follicular growth at fixed-time intervals has been found during the luteal phase, and growth probably occurs at random until the follicle attains a size of 4 to 7 mm. This shows that follicles can enlarge under a wide range of hormonal levels. The recruitment of...

Sheep abomasal phytobezoariasis: the effect of breed, season and age with histopathological observations

The prevalence of the latent form of sheep abomasal phytobezoariasis and the effect of husbandry management on this condition were determined in a survey in and industrial abattoir in Urmia from June 2005 to July 2006. The effect of different age groups and seasons on the prevalence of sheep abomasal phytobezoariasis was also determined. Furthermore, the histological changes in the affected abo...

Normal hematological values of native iranian cattle as influenced by age,breed and sex

Ultrasonographic Findings of the Liver in Lori Breed Sheep

Objective: The aim of this study was ultrasonographic findings and technique ofthe liver in the Lori breed sheep.Design: Descriptive study.Animals: 10 clinically healthy, female sheep.Procedures: Ultrasound examination of liver performed from the caudal aspect of13th rib to the 7th intercostals spaces (ICS). The possibility of liver imaging fromeach ICS, distance between the position of liver i...