Calculating the due date of your precious cargo is a natural first step after getting your positive test. In order to figure that out, you’ll need to A) go wash the pee off your hands, and B) think back to when your last menstrual period (or your LMP) was.
There are a few schools of thought about how to get the most accurate due date, but the most common method, Naegele’s Rule, is made by counting out 280 days from the start of your last menstrual period. Just like any due date calculator, this one isn’t exactly perfect since it makes the assumption that your cycle is 28 days, but it’s a fairly good place to start.
How a Due Date Calculator Works
Assuming your cycle is 28 days, that means your luteal phase, the time after ovulation, where an egg travels down the fallopian tube chancing an encounter a sperm, typically happens around day 12-14 of your cycle….