My wife last periods was on 23 Feb , How I can count the pregnancy of 9 month because as per my Dr ..My wife complete 9 months and 9 days but last sonography report said that it's 36 weeks 6 days what to do ? Dr saying that prepare for c section. Why it could not be done by normally ? In report every thing is normal

Check with your gynecologist for reason. You should know the reason for sure. Please read this article
EDD Calculator: For An Organized Pregnancy Care

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