forty ewes (3-6 years of age, average weight 41.2 kg)were randomly chosen from the flock of the sheep experiment station of tripoli university. ewes were divided into two groups, control group (c) received untreated barley straw and treatment group (t) received barley straw treated with 10% urea solution applied as 40% (v/w). barley straw was sprayed with molasses when fed to animals. both grou...

gonadotropin releasing hormone (gnrh) plays a key role in reproduction. this decapeptide is synthesized and released by hypothalamus and induces the pituitary gonadotrop cells to release pituitary gonadotropin hormones. in some extrapituitary compartments gnrh and its receptor act as part of the autocrine regulatory system of cell proliferation. the anticancer activity of gnrh and its analogues...

introduction: the purpose of this study was to determine alkaline phosphatase (alp) activity of ovary after ovarian induction using pregnant mare serum gonadotropin (pmsg) and human chorionic gonadotropin (hcg) during implantation periods. material and methods: a total of 240 female nmri mice aged 6-10 weeks were selected and divided into control and hyperstimulated. these mice were rendered no...

an experiment was conducted to investigate the effect of different types of ovarian cycles on reproductive indices and blood metabolites in 61 holstein cows. blood samples were taken from each cow between day 12 and day 50 postpartum (pp). serum progesterone concentrations were measured to determine the onset of luteal function and different types of luteal dysfunctions in cows. serum glucose, ...

Background Ovarian tissue cryopreservation represents a promising strategy to preserve the ovarian function in cancer patients. It is usually performed by slow freezing/rapid thawing (SF/RT). Recent studies emphasize an ultrarapid cryopreservation procedure, vitrification/warming (V/W), since it might prevent damages due to ice crystal formation. Comparative studies between the cryopreservation...

Background Ovarian tissue cryopreservation represents a promising strategy to preserve the ovarian function in cancer patients. It is usually performed by slow freezing/rapid thawing (SF/RT). Recent studies emphasize an ultrarapid cryopreservation procedure, vitrification/warming (V/W), since it might prevent damages due to ice crystal formation. Comparative studies between the cryopreservation...

the present study investigated serum cortisol in response to postpartum ovarian resumption and luteal function. postpartum ovarian resumption was detected based on a rise in progesterone (p4) concentrations during three weeks after calving. twenty two holstein cows in a semi-closed dairy farm in qena city, egypt were used. the study was carried out from late march to early june; the period char...

An experiment was conducted to investigate the effect of different types of ovarian cycles on reproductive indices and blood metabolites in 61 Holstein cows. Blood samples were taken from each cow between day 12 and day 50 postpartum (PP). Serum progesterone concentrations were measured to determine the onset of luteal function and different types of luteal dysfunctions in cows. Serum glucose, ...

The present study investigated serum cortisol in response to postpartum ovarian resumption and luteal function. Postpartum ovarian resumption was detected based on a rise in progesterone (P4) concentrations during three weeks after calving. Twenty two Holstein cows in a semi-closed dairy farm in Qena city, Egypt were used. The study was carried out from late March to early June; the period char...