How to calculate the due date if the menstrual cycle is irregular

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'm also extremely sensitive to cold and coldness. How should I calculate the due date if my period is irregular?

Doctor's answer:

Due date refers to the month number 9 or -3, and the day number 7 of the last menstrual period. The due date has no relation to the length of the menstrual cycle. If your last menstrual period was on October 3, then your due date would be July 10 of the following year.
Hello, in your case, it is very possible that you are pregnant. It is best to go to the hospital for a detailed examination. You can have a blood HCG test or buy pregnancy test strips to check at home.

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