Ovulation can be detected by means of ovulation test strips, which predict ovulation by monitoring the luteinizing hormone peaks in urine. In general, female follicle development and menstrual cycle are regulated by the hypothalamus-pituitary-ovarian axis, and the hypothalamus releases a large amount of gonadotropins before the mature follicle is discharged. This hormone stimulates the pituitary gland to secrete gonadotropins, and the gonadotropins result in a peak of luteinizing hormone, with ovulation occurring 24-48 hours after the luteinizing hormone reaches its peak. Through the ovulation test paper to monitor the changes of luteinizing hormone to find the peak of luteinizing hormone, you can test whether it is in the ovulation period, and in the ovulation period for coitus arrangement can improve the chances of pregnancy.