The methods of follicle monitoring include ultrasound detection, ovulation test paper detection, basal body temperature measurement and ovulation day projection. 1. Ultrasound test: generally from the 9th to 11th day of menstruation, through the vaginal ultrasound test, generally see the dominant follicle, test every other day until ovulation, this method is currently more commonly used in clinical practice. 2. Ovulation test paper: The peak level of luteinizing hormone (LH) is detected to predict whether ovulation is occurring or not. The test is conducted through urine, and if the color of the red band in the test line area (T) is darker than or similar to the color of the red band in the control line area (C), then it suggests a positive result, which indicates that the person being tested is in the period of ovulation. 3. Basal body temperature measurement: start monitoring from the first day of menstruation, use the thermometer to measure under the armpits every morning, record the temperature in the notebook after five minutes of measurement, and keep recording until the next menstrual period, and measure the basal body temperature for three consecutive months. Normal female body temperature before ovulation is about 36.5 degrees Celsius, the body temperature will rise to about 0.5 degrees Celsius after ovulation, and the body temperature will return to the original level after menstruation. 4. Ovulation day projection: the day of ovulation is also the day the egg is discharged. Under normal menstruation, a woman’s ovulation period is counted from the first day of her next menstrual period, counting down 14 days to the day of ovulation, with the first 5 days and the last 4 days of the day of ovulation adding up to the period of ovulation. There are various methods of follicle monitoring as mentioned above, it is recommended to visit the gynecology department of your local hospital and have it done under your doctor’s guidance according to your situation.