Effects of androgen on erectile function induced by apomorphine and electric field stimulation in castrated rats

Objective: To explore the effects of androgen supplementation on erectile function in castrated rats. Methods: Forty mature male SD rats were divided into 4 groups (10 for each group). The rats in Group 1,2 and 3 were castrated and Group 1 and 2 were treated with high dose (20 mg·kg -1·d -1) or low dose (10 mg·kg -1·d -1) testosterone undecanoate (TU) respectively. Group 4 underwent sham operation, as control. After 4 weeks of treatment, the...