Clear blue pregnancy test

I can’t say for sure but it was that for me. Took it at 3 weeks 4 days post ovulation, it showed 1-2.

Yes it is true. It means you conceived 1-2 weeks ago, but the doctors start counting your pregnancy since ovulation or something like that, so it adds 2 weeks.

So, while conception happens after ovulation, sometimes we ovulate late/at weird times. And sometimes in weird ways... like in my case I "hyperovulated" meaning I released 2 eggs at once, and both are fertilized. This leads to fraternal twins (NOT identical- that's when the fertilized egg splits into two!).
So to have a more "standardized" way to medically count pregnancy gestation, they go by the first day of your last period. This way it's kind of a good general idea for every pregnancy. For example, I likely conceived my twins around May 18th this year. However, they count the start of my pregnancy from the first day of my last period, May 5th.

It isn't super common knowledge I'm learning, especially as I didn't even know it myself until maybe 2 months ago, but it is just a standardized way of measuring pregnancy, since all bodies are different! This also means that sometimes you can carry up to what is medically considered 42 weeks, and still be considered a normal and healthy pregnancy and birth at

Yes. The leaflet inside will tell you it measures since conception, whereas pregnancy is measured from first day of last period (LMP) for everything else