My cycles were always irregular so im not sure how to count from when. Gynac asked my last period date but im still confused how the due date is decided. Can someone explain how it works?
You start counting from the first day of your last period, though your babies might decide to crash the party much earlier like my twins did! Don't get too attached to the date, they will come when they are ready.
While the Last Menstrual Period (LMP) method is the standard way, an early ultrasound dating scan is considered the most accurate medical method to determine gestational age. I highly recommend discussing it with your doctor after your first scan.
Because of my irregular PCOS cycles, determining the exact date was very tricky for me. Doctors usually count from the first day of your last period, but a dating scan around 8 weeks is much more accurate. Don't worry if your dates seem off initially.
Normally they count from the first day of your last period, which basically adds a couple of weeks where you weren't even pregnant, haha! It is just a standard way to start planning your sweet cravings schedule.
Usually, the due date is calculated by adding 280 days to the first day of your last menstrual period (LMP). But don't stress too much about the exact day, because very few babies arrive exactly on their due date.
Just count from the first day of your last period to get a general idea, dear. Let the doctor confirm the exact date during your scan. Stay positive, eat well, and trust God's timing.
I am also trying to understand how this is calculated. Is it always from the last period date even if ovulation was late? It is so confusing to figure out!
My doctor explained that they use Naegele's rule (LMP minus 3 months plus 7 days) to estimate the due date. However, since cycle lengths vary, the crown-rump length measured during the first-trimester scan is the gold standard for final dating. Always trust the scan date over LMP if there's a big difference.
