Doctor's could pregnancy weeks from the first day of your last period, but do you?

Question

Just curious because I've heard people count all kinds of ways.

Answer

My doctors office goes by the first date of your last menstrual. Then at the dating scan (around 8 weeks) they'll change your EDD if it's off by more than a week. I remember with #1 my LO was measuring 2 days behind (I knew he would be because I have 30 day cycles). They left the same due date though because it wasn't off by more than a week.

Doctor's could pregnancy weeks from the first day of your last period, but do you?

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