The human follicular fluids (F.F.) may be considered to contribute the maturation of the oocytes on the in vitro culture. To investigate the effects of epidermal growth factor (E.G.F.), which is present in mature and immature follicular fluids,
we
had
experiments of mouse oocytes maturation in vitro.
The endpoints assayed were rated as percentage of oocytes undergoing germinal vesicle breakdown (G.V.B.D.) and polar body (P.B.) formation at 12 hours after in vitro culture.
The rates of G.B.B.D. were 87% in mature F.F. 68% in immature F.F. and 78% in Ham's F-10 medium respectively.
And overall the mature F.F. seem to stimulate on in vitro oocyte maturation compared with either immature F.F. or Ham's F-10 medium.
As the concentration of addition of E.G.F. in immature F.F., the rates of G.V.B.D. and P.B. formation were 82%, 23% in addition with 2ng/ml while 84%, 32% in addition with 4ng/ml respectivly. And at the concentration of addition of E.G.F. in
Ham's
F-10
media as well, the rates of G.V.B.D. and P.B. formation were 84%, 40% and 82%, 44% in addition with each 2ng, 4ng.
Accordingly there was no influence on the oocytes maturation at the addition of E.G.F. to each immature F.F. and Ham's F-10 medium.
In conclusion, the E.G.F. is not able to induce oocyte maturation independent of it's effects in immature F.F. and Ham's F-10 media.
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