Abstract: This paper deals with the features of the circular movement based on the Taiji Diagram,i.e.the universality,continuality,phases,renewal,constancy and relative equilibrium of the circular movement,the interaction,interrelation and spiral movement of yin and yang,and the theory of yang within yin and yin within yang.The authors enunciate the reproduction rhythm based on the regularities of the circular movement and analyze the feature of the movement.It is believed that the reproduction regularities and the should be utilized in the treatment of the intractable diseases of reproduction and menstruation.