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These studies were carried out to investigate the effect of gonadotropins (GTH), fetal calf serum (FCS), porcine follicular fluid (pFF) and FCS and pFF fractions obtained by the gel filtration on in vitro maturation of porcine follicular fluid. When the oocytes were cultured in TCM-199, the maturation rate was higher in pFF than in FCS in both with or without GTH and in pFF the maturation rate was higher in with GTH than in without GTH. In case of without GTH, pFF increased maturation rates in TCM-199, but not in Whitten’s medium (WM). When the oocytes were cultured in WM supplemented with FCS fractions, the maturation rate(51.6%) of oocytes was significantly (P<0.05) higher in fraction B (about 30∼70 kDa) than in control, FCS and other fractions. When oocytes were cultured in WM supplemented with pFF fractions, fractions B (about 30∼70 kDa) and D (about 1∼10 kDa) were significantly (P<0.05) higher than in control, pFF and other fractions. In conclusiion, the addition of gonadotropins into the maturation media was effective for oocyte maturation. The addition of pFF was more effective than addition of FCS for maturation of porcine oocytes in vitro. And fraction B from FCS and fractions B and D from pFF was effective for oocyte maturation.
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