Home pregnancy tests detect the hormone hCG in urine. According to the NHS, most work from the first day of a missed period, and a positive result is almost always right if you follow the instructions. This list covers strips, midstream tests and multipacks that sell well on Shopee Vietnam, ranked by the independent usdxu score from real sales and reviews. Check the leaflet, because reading times differ between brands. If the result is negative and your period still has not come, test again in a few days; if positive, book a check-up to confirm the pregnancy.