Worried about leg position

meghan&blake

I'm high risk so I have an ultrasound every week to monitor the heart, so I've been noticing at my appointments that she has been in the same position for almost a month straight. She is laying on her back with her legs straight across her body instead of having her legs curled up. 

 

Has anyone  had an ultrasound like that? I asked the doctor the other day and she said that some babies just find a comfy spot and don't move much. She moves her arms and legs around during tge ultrasound so I know she's moving but the legs still stay straight. 

I have no clue