Objective To study the curative effect and mechanism of Bushen Huoluo Fang in treatment of polycystic ovary syndrome (PCOS, type of kidney deficiency and blood stasis). Methods The patients (n =78) with PCOS (type of kidney deficiency and blood stasis) were randomly divided into treatment group ( n = 40) and control group ( n = 38). The treatment group was orally given Bushen Huoluo Fang and control group was given Diane-35 for 3 months. The curative effect, levels of testosterone (T) and luteinizing hormone (LH), follicle-stimula...