The follicles can be monitored by basal body temperature, ovulation test strips, discharge monitoring and ultrasound. If the follicle reaches a certain mature size but does not rupture spontaneously, it can be treated symptomatically with ovulation medication, such as intramuscular injection of uropoietin, usually 5,000-10,000 u of uropoietin when the follicle reaches 18 mm, and the egg is usually expelled within 24 hours after intramuscular injection. If you are preparing for pregnancy, you need to monitor by ultrasound in order to schedule intercourse. Ultrasound can be used to determine the follicular development, such as the presence of follicular dysplasia or absence of follicular development, which can be initially assessed by ultrasound and sex hormone 6 tests. Ultrasound is the gold standard for monitoring follicular development during the normal menstrual cycle. Usually, follicles can grow by 1.5 mm per day on days 3-5 of the menstrual cycle. A mature follicle with a diameter greater than 18 mm can predict ovulation to occur within 24 hours, usually reaching about 22 mm, when the follicle can normally rupture and release to unite with sperm to form a fertilized egg. If the follicle is greater than 30 mm in diameter and still cannot rupture, it is considered to have formed a follicular luteinization, or luteal cyst, which is usually a physiological cyst that can reduce or even disappear on its own with menstrual changes. In short, if ovulation abnormalities occur, you need to have regular checkups to understand the endocrine situation, keep a good state of mind and eat more soy products. Ovulation promotion should not be excessive, and you need to follow medical advice to avoid follicular hyperstimulation syndrome which may affect the normal growth and development of the ovaries.