
Keywords: VTG، vitellogenin; EO, ethylene oxide; PO, propylene oxide; E2, 17β-estradiol; VTG, vitellogenin; SDS, sodium dodecyl sulfate; MS 222, 3-aminobenzoic acid ethyl ester methanesulfonate; EE2, 17-α-Ethynylestradiol; TEG, triethylene glycol; EIA, enzyme-immunoassay method; ELIS