Low heart rate in early ultrasound?

Katherine

I just had my second ultrasound (due to subchorionic bleeds).

According to lmp I should be 7+1. The ultrasound dated me at 6+3 with a baby heart rate of 113.

My dr said that’s a little low and I have to go back next week for a follow up.

I had a mmc in April where the baby dated a week behind at my first ultrasound so I’m very worried that is going to happen again.