The following conditions indicate that ovulation may be normal: 1, in the middle of menstruation, there will be clear and egg white like white belt, and the degree of pulling is particularly good, relative to the white belt and more, indicating that there may be ovulation. 2, in the second half of menstruation through the monitoring of the basal body temperature will be found to be elevated in the basal body temperature of 37 ℃, this high temperature state, if the state of lasting for more than 12 days indicates that there is ovulation, the luteal corpuscle formation after the ovulation. 3, Through the ultrasound examination under the visualization of the growth and development of follicles, will also know whether there are dominant follicles in the ovary, whether ovulation will be very clearly understood.