If the ovulation test paper is strong positive for three days, it is considered that ovulation is about to occur. When the ovulation test paper is tested, it mainly detects the level of luteinizing hormone in the urine to see if there is any change. If the luteinizing hormone level in the urine is high, you may be about to ovulate. When the follicle gradually develops and matures, the luteinizing hormone in the body will gradually rise to its peak and remain there for about 48 hours, and the ovulation test paper will appear strongly positive, so there is no need to worry, it is normal. If there are no other problems, you can get pregnant by having intercourse. The chance of getting pregnant after ovulation is very high, and the quality of the fertilized egg is relatively high. The strong positive test paper will gradually turn negative after about 2-3 days, indicating that ovulation has occurred.