Effect of Royal Jelly on the Fertilizing Ability of Buffalo Spermatozoa In Vitro
The aim of the present study was to assess the effect of addition of Royal jelly in presence of heparin on buffalo (Bubalus Bubalis) sperm motility, acrosome reaction and in vitro fertilization (IVF) of buffalo oocytes. Frozen buffalo spermatozoa from five bulls were thawed and motile fraction was obtained by swim up technique. The spermatozoa were washed, treated with100 µg/ml heparin, and then exposed to 0.4% Royal Jelly (RJ) for 3 h. Sperm motility, acrosomal integrity and fertilization rate of matured oocytes were assessed at 1, 2 and 3 h. The percentages of sperm motility, intact acrosome and fertilization rate of matured oocytes were higher (P<0.05) in 0.4% RJ compared to that in the control. After 2 h of incubation the percentage of motility, intact acrosome of spermatozoa and fertilization rate of matured oocytes, respectively, were 93.6 %, 77.6% and 72.6% in 0.4% RJ. These results suggest that treating buffalo sperm with 0.4% RJ in combination with heparin is effective not only to induce sperm acrosome reaction but also is effective for in vitro fertilizing capacity of the cryopreserved buffalo spermatozoa.
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