Pregnancy tests detect the hormone hCG in urine. UTI test strips check urine for leukocytes and nitrite. (For comparison, COVID antigen home tests detect viral antigens from a nasal swab.)
Most kits include written instructions and a test device — for example, testing strips for urine tests or a swab for a nasal antigen test. Package quantities and the exact components vary by product, so check the product listing or package contents before purchasing.
The listings indicate use for adults and children aged 2 years and up, and they are authorized for testing both with and without symptoms.
Instructions vary by product. Some directions say to dip the strip until the dye rises (about 5–10 seconds), while others instruct holding the absorbent tip in the urine stream for about 5 seconds. Always follow the specific product’s instructions.
Detection windows vary by product: listings show options from about 1 day before your expected period up to 5–6 days before a missed period. Check the specific test’s claims for its advertised earliest detection.
