12 week ultrasound?

Hi all!

My last ultrasound was at 8 weeks. I had an 11 week appointment last week, and they checked on the baby using a Heart Doppler (and it was 165). After that, they told me that my next ultrasound would be at 20 weeks.

I was wondering if it was common to not have an ultrasound between 8 and 20 weeks? I just want to make sure all’s good with the baby before announcing!