How long does it take to determine the ovulation time after the strong positive of the ovulation test paper turns weak? Ovulation is the most important part of the female reproductive cycle. For women who want to conceive offspring, the importance of accurately predicting ovulation time is self-evident. Ovulation test paper is currently the most common ovulation prediction tool. So how long does it take to determine the ovulation time after the strong positive of the ovulation test paper turns weak? The following is a detailed explanation from four aspects. What are ovulation test strips? Ovulation test strips are an oral or urine dip technique used to measure lutein production in urine