The shelf life of early pregnancy test strips is about 2 years, the specific time may be slightly different due to different brands. When you use it, you still need to look at the packaging of the test strips, which will have the production lot number and expiration date written on it, and you can use it before the expiration date. Early pregnancy test strips need to be used within the expiration date, if the expiration date is exceeded, it should be discarded, so as not to detect the wrong results. When using early pregnancy test paper, usually choose morning urine to check, and strictly follow the instructions on the operating steps to avoid inaccurate results. In the clinic, you can use the early pregnancy test paper to check after a week of menopause, if there are two bars, it means that it is positive, and it is already pregnant. Women can further perform blood HCG, ultrasound to confirm the diagnosis of intrauterine pregnancy.