6 weeks or 8 weeks?

So I'm a bit confused, the app tells me I'm 8 weeks as its counting the two weeks before conception but surely I'd be only 6 weeks from conception? 
The app shows me the little photo of a baby at 8 weeks and I'm wondering if that's the actual size the baby is supposed to be or is it two weeks ahead? Thanks :) 

Vote below to see results!

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors