Normal women ovulate every month. After an egg matures in the ovary, it is excreted from the ovaries and transported to the uterus via the fallopian tubes. The pregnancy process is formed by a egg in the fallopian tube combined with sperm. Sperm can survive for about 24-72 hours in the female reproductive tract, while an egg is fertilized only about 24-36 hours after ovulation. In women's menstrual cycle, the luteinizing hormone (LH) in the urine in the 24-48 hours before ovulation, and all ovulation strips can accurately detect the level of LH, so that women can predict the best. The time of . Women should first determine their own menstrual cycle before testing. The algorithm is a cycle from the first day of menstruation to the day before menstrual period (the first day of the first blood day). Most women ovulate in menstrual period. The first 14 days or so, so 2-3 days before ovulation and 1-2 days after ovulation is easy to receive pregnancy, that is, 4-5 days before and after the ovulation day is estimated to be susceptible to pregnancy Instructions: 1. Collect urine in a clean and dry container. Do not use morning urine. The best time to collect urine is from 10:00 am to 8:00 pm. Try to use the urine sample at the same time every day. The urine should be reduced 2 hours before collecting urine. Ingestion. 2. The test strip be immersed in the urine with one end of the mark line. After about three seconds, it be taken out and laid flat for 10-20 minutes. The result be read within 30 minutes. 3. The depth of the test paper inserted into the urine should not exceed the MAX mark line. Description Name: Ovulation test paper Quantity: 20PCS Color: Pink Material: Aluminium Package Package Contents: 20* Ovulation test strips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.