Using Naegele's rule, what would be the expected date of birth for a client whose last menstrual period began on January 11?

To determine the expected date of birth using Naegele's rule, the process involves taking the first day of the last menstrual period (LMP) and applying the rule that adds one year, subtracts three months, and adds seven days.

Starting with the LMP of January 11, you would first add one year, resulting in January 11 of the next year. Then, you subtract three months, which takes you back to October 11. Finally, you add seven days to October 11, leading to an expected date of birth of October 18.

This method effectively accounts for the typical 28-day menstrual cycle and the average gestation period, allowing healthcare providers to estimate a due date for pregnancy with a reasonable level of accuracy. Hence, October 18 is the correct expected date of birth based on this calculation.