A woman arrives at the clinic for a pregnancy test.Her last menstrual period (LMP)was February 14,2011.Her expected date of birth (EDB)is:

Question

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Using Nägele's rule,the EDB is calculated by subtracting 3 months from the month of the LMP and adding 7 days + 1 year to the day of the LMP.Therefore,with an LMP of February 14,2011,her due date is November 21,2011.September 17,2011,is too short a period to complete a normal pregnancy.Using Nägele's rule,an EDB of November 7,2011 is 2 weeks early.December 17,2011,is almost a month past the correct EDB.

A Woman Arrives at the Clinic for a Pregnancy Test