Principle of detection In each menstrual cycle, Luteinizing hormone (LH) in urine will peak 24 ~ 36 hours before ovulation, Using ovulation test paper, it is more accurate to detect the same sex within 24 hours after LH reaches the peak level. It can greatly improve the chances of conception. The timing of the test is different for each woman’s menstrual cycle days. During the test, you can refer to the < < Ovulation by Cycle Test Table > > to find the date when you started the test. First find your menstrual cycle days on the table, Then find the corresponding start detection date in the [Start Detection Date] column on the next row. For example, If a woman’s Read More …