What is the reason for a false positive ovulation?

Patient's question:

Is my ovulation normal? I had my period on July 9th, then August 7th, then September 7th, then October 7th, and then November 6th. However, when I used an ovulation test strip, I only got a positive result on November 22nd, and it was still positive on the morning of November 26th, but I didn’t feel like I ovulated this month. The expert Q&A suggested it might be a false positive. What is a false positive? I’m trying to get pregnant, but after trying for two months, it’s now the third month, and having sex during the so-called ovulation period doesn’t seem to have any effect. What could be the reason? Please help me find an answer from the experts. Thank you!

Doctor's answer:

A weak positive result on an ovulation test paper refers to a situation where a woman consistently measures a weak positive on the test paper during ovulation without seeing a strong positive. The test paper has a layer of chemicals, and the amount of chemical applied on each brand of test paper is fixed. If the LH level in the woman's urine on the day of ovulation is less than the amount applied on the test paper, a strong positive result will not be detected. The doctor can confirm that this is usually not a problem with the woman's body, but rather that the test paper is not suitable for her, so there is no need to be overly worried or anxious. If the test paper consistently shows a weak positive, you can switch to using a Mami Quick Conception device to track ovulation. As long as ovulation occurs normally, the device can detect the day of ovulation.

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