Aim To study the effect of all-transretinoic acid(ATRA),a cell differentiation agent on the occurrence and growth of female progestogen-induced uterine fibroids, and the influence of ATRA on the expression of retinoic acid receptor-α(RARα) and inducible nitricoxide synthase(iNOS).Methods 60 Wistar rats were randomly divided into 5 groups,control(A),model group(B),ATRA low-dose group(C),ATRA mid-dose group(D) and ATRA highdose group(E).Fibroid model of rat was established with Estrogen and Progesterone Load ...