Based on a July 20 LMP, what predicted delivery date can the nurse provide to the couple?

To determine a predicted delivery date based on the last menstrual period (LMP), healthcare providers often use a standard formula known as Naegele's Rule. This formula involves adding one year, subtracting three months, and then adding seven days to the first day of the last menstrual period.

Given a last menstrual period date of July 20, we can break down the calculations as follows:

1. Add one year: July 20 plus one year brings us to July 20 of the following year.

2. Subtract three months: From July, counting back three months takes us to April 20 of that year.

3. Add seven days: Finally, adding seven days to April 20 results in April 27.

Therefore, the predicted delivery date for a pregnancy starting from a July 20 LMP is April 27. This method provides a systematic way to estimate the due date, which is essential for prenatal care planning and monitoring the mother’s health throughout her pregnancy.