My gynac keeps saying weeks based on LMP but i get confused doing the math at home. Can someone explain simply how to count from last period? Want to track properly myself.
Download a pregnancy tracker app like Flo or BabyCenter! You just have to put the first day of your last period (LMP) and it calculates your exact weeks and due date instantly.
I was so confused by this because conception happens later, but doctors always count from the first day of your last period! It made me so anxious thinking I was 'more pregnant' than I actually was. Don't worry, it's just the standard way they calculate.
Calculating from LMP is the standard way, but sometimes ovulation is late. When you get your first ultrasound, the doctor might adjust the weeks. Please don't worry if the dates differ slightly, just stay gentle with yourself.
With my irregular cycles from PCOS, calculating by LMP was actually quite inaccurate for me. If your cycles are irregular too, don't rely only on LMP—your doctor will give you the correct weeks after an early dating scan.
According to medical standards, pregnancy is calculated from the first day of your last period because that's when the new egg cycle started. My gynac explained that ovulation is harder to pinpoint, so LMP is the most reliable baseline they use.
It can be really confusing at first and it's totally okay to feel overwhelmed by all these calculations. Just take the first day of your last period as Day 1. Your doctor will confirm the exact dating during your first scan anyway.
My mom explained that doctors always start counting from the day your last period started. It sounds strange since the baby wasn't there yet, but that's how they calculate the 40 weeks. Hope this helps you!
