A patient's pregnancy test is positive, and she wants to know when the baby is due. The first day of her last menstrual period was June 14, and that period ended June 20. Using the Nägele rule, what is her expected date of delivery?

A) March 7
B) March 14
C) March 21
D) March 27

Nägele Rule

A standard way of estimating the due date of a pregnancy by adding one year, subtracting three months, and adding seven days to the first day of a woman's last menstrual period.

Last Menstrual Period

The first day of a woman's most recent menstruation, used in calculating due dates in pregnancy.

Expected Date of Delivery

The estimated date when a pregnant woman is likely to give birth, calculated from the date of the last menstrual period or an early ultrasound.