If a client has an estimated due date (EDD) of April 23, what is the probable date of her last menstrual period (LMP)?

To determine the probable date of the last menstrual period (LMP) based on the estimated due date (EDD), healthcare providers typically use a formula that subtracts three months from the EDD and adds seven days. This method follows the Nagele's Rule, which is a widely accepted calculation for estimating due dates.

In this scenario, the client's EDD is April 23. By applying the calculation:

1. Subtract three months from April, which brings us to January (the corresponding day of the month remains the same).

2. Next, add seven days to the date, resulting in January 30.

This date, January 30, allows for the anticipated 40-week gestation period starting from the first day of the last menstrual period, leading us back to the calculated date.

However, it seems there was a misunderstanding in the choice you selected. The correct probable date for the last menstrual period based on the April 23 due date is likely March 23, as that corresponds to the standard calculation and is reflective of a typical menstrual cycle.

By recognizing how to effectively compute the LMP from the EDD through consistent calculations, you can accurately estimate key dates related to pregnancy.