When the female partner goes to the gynecology clinic, the doctor often recommends ovulation monitoring, including temperature testing, ovulation test strips and ultrasound testing to measure the quality of the eggs by follicle development. Ultrasound is the most accurate method to monitor follicle development. It can directly observe the morphological changes of follicles in a continuous and dynamic manner to understand the whole process of follicle development and ovulation, and can also determine whether ovulation has occurred. Continuous observation by ultrasound is usually started on the twelfth day of the menstrual cycle to observe changes in follicle diameter, every other day, until the egg is expelled. The follicle normally grows about 2mm to 3mm per day and grows fast near ovulation, up to 3mm to 4mm. Mature follicles are characterized by a maximum follicle diameter of more than 20mm, full morphology, thin inner wall and shifted position towards the surface of the ovary. After ovulation, the follicle disappears. Continuous monitoring shows that the follicle grows continuously before ovulation and when the largest follicle disappears, it indicates that ovulation has occurred. The basal body temperature is the temperature measured after 6-8 hours of rest, before getting up, eating or talking. Basal body temperature is usually the lowest body temperature of the body during the day and night. The basal body temperature of normal women of childbearing age varies cyclically, as does the menstrual cycle, and this temperature change is associated with ovulation. By measuring the basal body temperature, we can initially understand whether a woman is ovulating and the condition of the luteal function after ovulation. 1. First of all, you need to buy a basal thermometer. The basal thermometer is different from the general thermometer, it has a dense scale, generally 36.7 degrees Celsius (scale 24) as the boundary of high and low temperature; 2, download and print a copy of the basal body temperature table, record the measured temperature every day, so that it is wavy line statistics; 3, the thermometer is best placed on the pillow, need to wake up in the morning with eyes open, not yet talking, activity under the tongue for three minutes, and recorded on the basal body temperature table If you have a fever, drink alcohol the night before, or use an electric blanket, your body temperature may not be accurate. Ovulation test paper is used to detect the peak level of luteinizing hormone (LH) to predict whether ovulation is occurring. It can be used to qualitatively detect luteinizing hormone (LH) in human urine to determine the time of ovulation and to choose the best time to conceive, and is an in vitro test for women to detect and assist in the diagnosis of ovulation. The instructions for the use of different ovulation test strips may vary slightly, but in general it is best to use urine from 10:00 am to 8:00 pm, with the best time being from 2:00 pm to 2:30 pm. You should also not drink too much water in the two hours before the test. Ovulation measurement should start one week after menstruation, one test per day, and continue until ovulation is confirmed, i.e. when a weak positive is measured towards a positive, start testing twice a day, and when a strong positive is shown, test every 4 hours, when you see the color getting darker, or even when you see a sudden lightening, ovulation is about to start.