Objective: To explore the effect of Tiangui Recipe (TGR) on obesity and reproductive function in androgen sterilized rats (ASR). Methods: ASR model was established by subcutaneous injection of testosterone propionate to SD female rats of 9 days age. Change of serum leptin, follicle stimulating hormone (FSH) and luteinizing hormone (LH) in model rats of 115 days old before and after feeding TGR was measured by radioimmunoassay (RIA). Meanwhile, criteria of energy state, including diurnal food intake, retroperitoneal fat depot weight and body weight, were measured and evaluated. Results: ASR had the characteristics of high metabolic rate, energy imbalance and obesity. Serum level of leptin increased and FSH, LH decreased significantly (P<0 01) in model rats as compared with the normal rats. Significant positive correlation between leptin level and body weight (r=0 8977,P<0 001) was observed, and negative correlation was seen between FSH, LH and leptin (r=-0 7517,P<0 001;r=-0 8444,P<0 001, respectively). The endocrinous changes of ASR all returned to normal range after the TGR treatment. Conclusion: Obesity and concerned hypogonadotropic hypogonadal anovulation were expressed in ASR. TGR may play an important role in reducing weight and inducing ovulation. Objective: To explore the effect of Tiangui Recipe (TGR) on obesity and reproductive function in androgen sterilized rats (ASR). Methods: ASR model was established by subcutaneous injection of testosterone propionate to SD female rats of 9 days age. Change of serum leptin In addition, criteria for energy state, including dillnal food intake Results: ASR had the characteristics of high metabolic rate, energy imbalance and obesity. Serum level of leptin increased and FSH, LH decreased significantly (P<0 01) in model rats as compared with the normal rats. The Significant positive correlation between leptin level and body weight (r=0 8977, P<0 001) was observed, and negative correlation was seen between FSH, LH and leptin (r=-0 7517, P<0 001; r=- 0 8444 ,P<0 001, respectively). The endocrinous changes of ASR all returned to normal range after the TGR treatment. Conclusion: Obesity and concern hypogonadotropic hypogonadal anovulation were expressed in ASR. TGR may play an important role in reducing weight and inducing ovulation.