Little boys penis are very noticeable a peek sticks out in between there legs if it was a boy I would say he would of seen a penis already but since he didn't I think it night be a girl. But those ultrasound techs are not specialized to determine the sex of baby when they do ultrasound to see What's causing pain and stuff the have only job only to take a look at abdominal area not baby.
Well my baby's heart beat is always around 160 but sometimes its at 145.
How much do 3d/4d ultrasounds cost normally?
I would wait until your US. My baby has always had a fast heartbeat which is more common in girls but he is a boy. I was in the er at about 20 weeks with contractions and the nurse told me that the baby had a fast heartbeat and could be a girl. So I was expecting to have a girl but at my US they confirmed boy.