Background: Hen egg yolk is a common component of most semen cryopreservation extenders. However, diluents containing the egg yolk may have adverse effects on the quality of the semen. Egg yolk could be solubilized by the addition of sodium dodecyl sulphate (SDS) in semen extenders. Many studies have shown beneficial effects of antioxidants addition to semen freezing extenders. Antioxidants are...

Samples of ram, bull and boar semen were subjected to cold shock and then stained using an indirect immunocytochemical method for detecting acrosin. It was found that the shock treatment abolished staining of the acrosomal region in all but a very few cells. This finding was interpreted as a great loss of proacrosin or acrosin from damaged acrosomes. Using a fluorescent label in the system, spe...

I : 10 caused a severe drop in fertility. In most of these studies as well as in more recent works (PoP, SAr.J Nand IozoN, Ig6q. ; Ani DAI &dquo; FJO ESN and HOVLAND , Ig6! ; SEMKOV and KOLE V, 19 66), the effect of dilution cannot be separated from that of the inseminated sperm number which was reduced by the increased dilution ratio. With the same number of spermatozoa per insemination dose, ...

The bio-stimulation technique offers a potentially useful and practical way for reproductive performance in rams. Reports on how bio-stimulation affects sexual potency rams are scarce: Knowledge of how rams respond to bio-stimulation is useful for persons who involved in semen collection; "hand" (controlled) mating, and the administration of sexual performance evaluations. The reduction of the ...

platelet activating factor (paf) is a novel signaling phospholipids that in addition to platelet activation has many biological properties. the acrosome reaction, as an essential step in mammalian fertilization, can occur in response to several agents such as paf. therefore, the present study aimed to assess the effect of paf on the motility and acrosome reaction of ram spermatozoa. semen was c...

an experiment was conducted to evaluate the impact of melatonin on scrotal circumference and semen parameters using 8 shall rams in april until june 2004 (out of season). in the april, the rams were randomly allocated in two groups. four animal received 3 implants of melatonin tablets (totally 54 mg/ram) at the base of ear and the other 4 rams were considered as control group and kept at the id...