u check pregnancy test strip positive

Sensitivity varies by product. Examples in the provided details list detection levels of 10 mIU/mL and 25 mIU/mL as published hCG sensitivity values.

Different strips use different sampling methods. Some instruct you to dip the strip into collected urine for about 5–10 seconds; others ask you to hold the absorbent tip in the urine stream for a few seconds. A few tests also include a color-changing tip to confirm the sample contacted the test.

Manufacturers and reviewers describe a faint but visible second line as a positive (pregnant) result. According to product descriptions, line darkness does not change the result, though different tests vary in sensitivity and how soon they can detect hCG.

Several tests state accuracy of over 99% from the day you expect your period.