According to Nagele's rule, what is the due date for a woman whose last menstrual period began on October 26?

Nagele's rule is a standard way of calculating a woman's estimated due date based on her last menstrual period (LMP). The method involves taking the first day of the last menstrual period, adding one year, subtracting three months, and then adding seven days.

For a woman whose last menstrual period began on October 26, the calculation would be as follows:

1. Start with the date: October 26.
2. Subtract three months: October minus three months brings you to July 26.
3. Add one year: This doesn’t change the day of the month, so it remains July 26 of the following year.
4. Finally, add seven days: July 26 plus seven days results in August 2.

Therefore, based on Nagele's rule, the estimated due date would be August 2. This method is widely used in obstetrics to provide a convenient way of predicting due dates, making it an essential tool in prenatal care.