Final answer:
The question is about calculating the last menstrual period or ovulation date based on an expected due date (EDD) of August 2, 2015. By applying Naegele's rule, which subtracts three months from the EDD and adds seven days, the estimated LMP would be May 9, 2015. This estimate assumes a regular 28-day menstrual cycle.
Step-by-step explanation:
The question 'EDD is Aug 2, 2015 When is last O?' refers to determining the date of the last menstrual period or ovulation, based on the provided expected due date (EDD) of August 2, 2015. This is commonly calculated in the field of obstetrics to estimate the gestational age of a fetus, which is important for monitoring the progress of a pregnancy.
To calculate the date of the last menstrual period (LMP), which is often referred to as 'last O' in shorthand, one can use Naegele's rule. This rule states that you can estimate the LMP by subtracting three months from the EDD and then adding seven days. Applying Naegele's rule to the given EDD of August 2, 2015, we subtract three months to get May 2, 2015, and then add seven days to arrive at an estimated LMP of May 9, 2015.
It's important to note that this is a standard calculation and actual ovulation and conception can vary based on the individual's menstrual cycle. Typically, ovulation occurs about 14 days after the start of the period, so the actual conception date might be approximately two weeks after the estimated date of the LMP for women with a regular 28-day cycle.