Background: There is a considerable numbers of buffalo (Bubalus bubalis) in Iran which have an important role in rural life. The reproductive performance of buffalo is lower than cow. Co-culture with somatice cells improved the maturation rate of most of the species. The aim of the present study was to evaluate the effect of bovine cumulus co-culture on post fertilization development of buffalo...

The objective of this study was to try to depress serum testosterone (T) in bulls by prolonged treatment with a potent luteinizing hormone-releasing hormone (LHRH) agonist. Eight sexually mature bulls (325 to 475 kg) were assigned to treatment or control groups. Treatment consisted of 150 micrograms nafarelin acetate 6-D-2-naphthyl-alanine-LHRH (LHRH-A) injected im every 6 h for 15 d. Bovine se...

In the series of studies, changes of expression and regulation of luteinizing hormone (LH) receptor in the ovary of domestic ruminants were examined. Furthermore, mechanisms of formation of follicular cysts in domestic ruminants, caused by stress and so on, were endocrinologically elucidated. Results of the studies provide the following conclusions. (1) The quantity of LH receptor in the bovine...

The objective of this study was to investigate the influence of various factors on blastocyst development in a bovine in vitro embryo production system. Two production systems were originally compared: Protocol 1, which utilized oocyte recovery by slicing, 20 % fetal bovine serum with FSH (FBS+) for oocyte maturation, and sperm preparation system 1 (F1), and Protocol 2, which utilized oocyte re...