The methods to detect the presence or absence of ovulation include taking basal body temperature, observing the leukorrhea, and the detection of ovulation. Starting from the 1st day of your menstrual period, start measuring your body temperature and record it every morning at the same time without any activity. When there is an increase in body temperature of 0.3-0.5 degrees, consider it to be caused by ovulation. After a woman enters ovulation, she will have a lacrimation-like leucorrhea. You can determine whether ovulation is occurring by observing the leucorrhea after the end of menstruation. The most accurate way to determine whether ovulation has occurred is to perform a follicle test by ultrasound or cathodynamics, which begins on the 11th day of menstruation. If the follicle is able to develop to 18-25 mm, the follicle will rupture and the egg will be expelled within 48 hours. If a mature egg is released during ovulation, increasing the frequency of sexual intercourse can increase the chance of conception.