I get my 20 week scan today, and I'm SO excited to finally know that my baby is growing strong and healthy. And also to know if I'm having another sweet little girl or boy. My question is, my boyfriend doesn't want to know the gender but wants to see the baby on ultrasound. Is there a way the tech can do this without accidentally revealing gender to him? And can he just leave after he sees the rest of the of the check up, and they tell me the gender then?