用大白鼠及豚鼠的在体及离体子宫当腹腔注射或直接加入不同剂量的保幼激素时,均能引起子宫活动显著兴奋作用,剂量在5mg/100g体重(在体)或0.02mg/ml(离体)之内,子宫活动呈节律性,量-效反应呈良好直线关系,超过上述剂量时出现强直收缩状态.用保幼激素引起的子宫兴奋作用可被心得安所抑制,推测保幼激素兴奋子宫作用可能与β受体有关. When mice or guinea pigs are injected intraperitoneally or directly with different doses of juvenile hormone in vivo and in vitro, they can cause significant stimulatory activity of uterine activity. The dosage is 5mg/100g body weight (in vivo) or 0.02mg/ml. Within (ex vivo), the uterine activity is rhythmic, and the dose-effect response is in a good linear relationship. Exceeding the above dose causes tetanic contraction. The excitability of the uterus induced by juvenile hormone can be inhibited by propranolol. Hormone stimulation of the uterus may be related to beta receptors.