Mohamed EL-Raey Mohamed

• Ass. Prof of Theriogenology
• Professor (Assistant) at Faculty of Veterinary Medicine , Benha University

The aims of the present study were to evaluate the effect of cooling of the dromedary camel embryos on the pregnancy and pregnancy loss rates, and to investigate the factors which might affect the outcomes of the transfer of cooled embryos. After the donors (n = 56) had been super-ovulated and mated, they were flushed at Day 8 or 9 post-mating. Of...

Objective: To evaluate the effects of reduced glutathione on the quality of cryopreserved Boer buck spermatozoa. Methods: The current study was carried out on five Boer bucks from which semen samples were collected by artificial vagina. After microscopical evaluation at 37 ℃, semen samples that fulfill the ideal requirements for extension were dilu...

Objective: To assess the anion gap (AG) validity in prediction the goat’s fertility before parturition. Methods: This study was carried out on two groups (20/20, aged 4–6 years and weighted 30–43 kg) of pluriparous pregnant Baladi goats. Animals were subjected to clinical examination, blood sampling to assess serum biochemical parameters in correla...

Objective: To assess the effects of melatonin and/or cysteamineon in vitro maturation, culturing and post-warming of buffalo embryos. Methods: Buffalo oocytes were classified into control, cysteamine (50 μM), melatonin (10 ng/mL) and cysteamine (50 μM) + melatonin (10 ng/mL) treatment groups. In experiment 1, previous treatments were added during i...

Recently, male impact has been recognized as a momentous cause of infertility. Male infertility isn’t an entity but it evokes a variety of mechanisms and explanations to understand it. In between, a biochemical semen additive that improves or overcome certain semen situations so can enhance or treat semen fertility and infertility, respectively. L-...

Received at: 10/12/2014 Accepted: 7/2/2015 Cryopreservation induces sublethal damage to the spermatozoa, which leads to reduce their fertile life. The objective of the present study was to investigate the effect of melatonin on freezability, ultrastructure and fertilizing potentials of the buffalo spermatozoa. Buffalo spermatozoa were cryopresreved...

Till now, the exact role of melatonin in male infertility hasn’t been fully discovered. Moreover, the intracellular signaling pathways activated by melatonin in buffalo spermatozoa especially on the level of cryopreservation process haven’t been reported. The current study aimed simply to clarify the precise role of this hormone during buffalo seme...

Cattle are considered one of the most important pillars of animal production in most countries of the world. As it being a building block in their national security strategies;endeavoring them to increase this animal population by all possible means. During the last three decades;it was clear thatin vitro maturation, fertilization and culturing of...

Mitochondria are a membrane-enclosed organelles found in most eukaryotic cells. Mitochondria are sometimes described as “energy house” because they generate adenosine triphosphate (ATP), which is used as a source of chemical energy. In addition, they are involved in cell signaling, cellular differentiation, cell growth, cell cycle and cell death. H...

Melatonin is a multifunctional molecule that mediates several circadian and seasonal reproductive processes. The exact role of melatonin in modulating reproduction, however, is not fully understood-especially its effects on the ovarian follicles and oocytes. This study was conducted to investigate the expressions of the ASMT and melatonin-receptor...