How to measure ovulation period most accurately

The most accurate way to detect ovulation is to enter the hospital for B-ultrasound monitoring. According to the size of the follicle to determine the time of ovulation, it belongs to the most accurate method of ovulation detection, but it takes time and materials. Ovulation test paper can also be used for ovulation detection. When ovulation test paper appears from strong positive to negative, ovulation will occur within 24 hours.