My doctor explained that the standard calculation uses Naegele's rule, where you add 7 days to the first day of your last period and subtract 3 months. But she also said the dating scan in the first trimester is the most accurate.
I used my last period date to get a rough idea, but my gynac adjusted it slightly after the first scan. Just keep that month end in mind and prepare slowly.
Hey, just use any online pregnancy calculator with your last period date, but seriously don't stress too much about the exact day. Babies rarely arrive exactly on time!
My little toddler was born exactly on his due date, which is super rare! I used my last period date to calculate it online, but don't hold onto that exact date too strictly.
While you can easily estimate it using your last menstrual period, the ultrasound dating scan is much more reliable. Your doctor will give you the most accurate EDD based on baby's measurements.
