I think HB is a great resource for information I haven't previously heard or would have never thought to google/research.

The thing that really sticks out for me was I learned that you start counting how many weeks pregnant you are based on the first day of your last period instead of Ovulation day/conception day. I always assumed conception was "day 0" and learning otherwise was new to me!

What sticks out as something you've learned from HB you didn't already know??