​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​H​​ad my anatomy​ scan today, 19w 4d. Are my baby girls arms supposed to be that bony? I'm underweight so I'm worried baby is too. They didn't say anything​ about​ her weight at the ultrasound.