범가자미 난모세포의 최종성숙(GVBD=germinal vesicle breakdown) 유도를 위한 HCG (human chorionic gonadotropin)와 스테로이드 호르몬들의 효능 비교실험이 in vitro에서 이루어졌다. 실험에 사용한 스테로이드 호르몬, progestogens (progesterone, $17alpha$-hydroxyprogesterone, $17alpha$-hydroxy, $20eta$-dihydroprogesterone)중에서는 $17alpha$-hydroxy, $20eta$-dihydroprogesterone ($17alpha20{eta}OHP$)이 매우 효과적으로 나타났으며, $17alpha20{eta}OHP$와 HCG와의 비교실험에서는 이들 모두 GVBD 유도에 효과적인 것으로 나타났다. 특히 $17alpha20{eta}OHP$는 저농도($10~50$ ng/ml)에서도 효과적이며, HCG는 사용한 농도(50, 100, 500 IU/ml)사이에 유의한차를 보이지 않았다.
The relative effectiveness of steroids and human chorionic gonadotropin (HCG) on germinal vesicle breakdown (GVBD) was investigated in vitro using the isolated oocytes (folliculated oocytes) from the spotted halibut, Verasper variegatus. Among the steroids tested, $17alpha-hydroxy,;20eta-dihydroprogesterone;(17alpha20{eta}OHP)$ was more effective than progesterone (P4) and $17alpha-hydroxyprogesterone;(17{alpha}OHP$). In comparing $17alpha,;20{eta}OHP$ with HCG, both $17alpha20{eta}OHP$ and HCG were effective in inducing GVBD at all concentrations : $17alpha20{eta}OHP$ was effective even at lower concentrations ($10~50$ ng/ml). HCG at three concentrations used (50, 100, 500 IU/ml) showed no significant differences in inducing GVBD.
