To determine that the egg is discharged, you can use ultrasound follicle monitoring, ovulation test paper and ovulation symptoms. 1. Ultrasound follicle monitoring: go to the hospital for ultrasound to see the maturity of the follicle and accurately grasp the time of ovulation, if the ultrasound detects the follicle rupture, it means that the egg is discharged. 2. Ovulation test paper: The luteinizing hormone in the body reaches its peak before the egg is discharged. During the test, if you find that the color of the second line is darker than the first line, or the color is becoming more and more obvious, it is time to ovulate. If the color becomes darker and then slowly becomes lighter, it means that the egg is discharged. 3. Ovulation Symptoms: Vaginal secretion will increase during ovulation, and the secretion will be as clear as egg white with pulling, if the secretion decreases, it means that the egg has been discharged. After the egg is discharged, there will be abdominal pain, occasional bleeding and other symptoms, but do not need special treatment, usually 3 to 5 days the symptoms will be significantly reduced. If you have any other questions, it is recommended to consult a professional doctor for guidance.