Ultrasound of Fetusaurus Rex at 7 weeks!

Brittany • wife to henry, mama to norah + chloe
Ladies, I'm due to have an ultrasound at 7 weeks at a clinic because I have a history of a miscarriage. Will I be able to see much or hear the heartbeat? Im also having another ultrasound at 8 weeks as well by my obgyn. I'm SOOOOO stinkin' excited! I've even named my baby Fetusaurus Rex just temporarily because I think it's cute and nerdy.