My doc said im 9 weeks but my own count was different, so im confused how exactly they calculate it. Is it from the last period or from conception? Matlab the dates never match for me. Can someone explain simply?
They use the last period date to calculate. My delivery date was calculated this way, but since I had a C-section later, my doctor adjusted the timeline slightly based on my early scans.
My gynac explained that they count 40 weeks from the start of your last period. It can be confusing, but the dating scan around week 8 confirms the exact age.
The doctor counts from your last period's first day. But please let your gynac confirm the exact age after your first scan, as cycles can vary for everyone.
Normally they calculate it from the first day of your last period, even though you weren't pregnant then. It sounds weird but that's how doctors track the weeks!
It starts from day one of your last period, not the day you conceived. So by the time you miss your period, you are technically already 4 weeks pregnant.
The standard way is using your LMP (Last Menstrual Period) date. However, the dating ultrasound in the first trimester gives the most accurate gestational age, so trust what your doctor says.
I was so confused trying to calculate my weeks using different apps and kept worrying! Just rely on your doctor's calculation based on your first ultrasound.
