It is possible to detect a weak positive result after ovulation, although it is usually not a strong positive. When a woman’s follicle matures and ruptures, luteinizing hormone decreases, and ovulation test strips can be weakly positive, or even negative as time goes on. Ovulation test strips are used to detect ovulation by monitoring the peak level of luteinizing hormone in a woman’s urine. A positive or strong positive test result means that the body’s luteinizing hormone has reached its peak and ovulation will occur within 2 to 48 hours. In addition, for women with fertility needs to have intercourse during ovulation, the egg and sperm have a greater chance of combining, which can further increase the chances of pregnancy.