| abstract |
A method of promoting the transition from the growth phase to the regression phase in the rodent hair cycle comprising the step of administering a male hormone to the rodent is provided. Further, in rodents, (a) inducing a synchronized growth phase in the resting period of the hair cycle, (b) administering a male hormone, (c) administering a drug, and (d) There is provided a method for evaluating the effectiveness of a drug, comprising the step of evaluating the degree to which the transition from the growth phase to the regression phase in the rodent hair cycle promoted by male hormone administration is suppressed by the drug administration. According to the present invention, in a simple in vivo male pattern baldness model, it is possible to effectively evaluate the effectiveness of hair growth agents, hair growth agents and the like. |