I remember feeling so overwhelmed when I had to calculate this for the first time. I felt so emotional realizing they count from the first day of your last period, not when you actually conceived! It makes the baby seem older than they are, but it's the standard medical way.
It's so beautiful how we count down every single day waiting for our little ones! Basically, the doctor counts from the very first day of your last period. Don't worry if the math seems confusing, you are doing great and your baby is growing beautifully.
I used to panic so much trying to calculate the days and worrying if my dates were wrong! But then my doctor explained that the baby's size in the first ultrasound is the most accurate guide. It's completely normal for the dates to shift slightly, so relax.
They generally calculate it from the first day of your last period (LMP). Since my baby was delivered via C-section, the doctor kept a very close eye on the gestational days from the early scans to schedule the delivery perfectly. Just trust your scan reports!
You should just ask your doctor or the hospital staff during your first scan. At my hospital, they calculated the exact days based on the dating ultrasound because my periods were quite irregular. They will write down the precise EDD on your file, so no need to stress.
