Patient's question:
Menstruation is one week late. It hasn't arrived, and I'm worried it might be pregnancy. I have lower back pain, abdominal pain, and breast tenderness. I bought a pregnancy test kit and followed the instructions to use it. I took the test twice, and both times it showed one line, indicating a negative result, meaning I'm not pregnant. However, my period still hasn't arrived, and I can't remember the timing of our sexual activity.What kind of help do I need: What is the accuracy rate of pregnancy test strips?
Doctor's answer:
Analysis of the condition: The menstrual cycle of a woman is generally 28 to 30 days. A delay or advancement of about 7 days is still within the normal range, as the length of the cycle varies from person to person. However, if menstruation does not arrive after more than 7 days, it is considered delayed menstruation. If your testing method is correct and the product itself is not faulty, the accuracy of a pregnancy test strip is approximately 85% to 95%. The earliest time to use a pregnancy test strip is 6 days after intercourse. For more accurate results, it is recommended to wait until 11 days later, as this is when it is most reliable.