Before the dating scan of course. Do you go by your LMP like they do at the booking appointment or do you go by when you ovulated (if you track it)?
Doesn't make much difference I suppose, just curious. As I just changed my pre mom app to track pregnancy and It just made me think. It will bug me if it says 4 weeks when I know I'm actually only 3+4. With my other 2 i always tracked it by when I ovulated and by the time I got to the dating scan it was spot on with my dates.
Maybe a boring post sorry 😂