Can a test detect if your period is delayed by one day?

Patient's question:

I got married last year. Recently, I've been experiencing lower abdominal pain, especially during my period. I'm very worried about it affecting my fertility, and I also feel extremely cold and afraid of the cold. Can a pregnancy test detect it if my period is delayed by one day?

Doctor's answer:

A delayed period by one day is a very normal phenomenon. It is normal if the delay is within a week. A delay of one day cannot be detected; generally, it takes a week for testing. Test strips are not entirely accurate and have a certain margin for error.
The occurrence of irregular periods not only affects a woman's body but can also lead to gynecological diseases. Therefore, it is best to undergo an ultrasound examination in the gynecology department of a hospital to identify the cause and receive targeted treatment. In daily life, it is important to drink more water and pay attention to personal hygiene.

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