Just got my positive and im trying to work out when i actually conceived, my cycles are a bit all over. Saw some NHS calculator stuff online but got more confused. How do u calculate it properly?
Conception date is usually counted around ovulation, roughly 2 weeks after the first day of your last period if your cycle is regular. My doctor said the dating scan gives the most accurate idea though, because it measures the baby's size. The exact day is hard to pin.
They calculate from your last period date, then conception is usually about 2 weeks after that. But honestly the scan is what they trust for proper dating. Dont stress over the exact day, even doctors give a window.
The online calculators take your last period date and add about 2 weeks for conception. I used one too but my dating scan shifted it by a few days. So treat the app number as a rough guess only.
It's estimated from your last menstrual period, with actual conception around ovulation. The most reliable answer comes from the early ultrasound. Best to confirm the exact dates with your gynac at your first scan.