Do you think prenatal ultrasounds are dangerous?

T🌸
So several of my friends have been discussing not having as many ultrasounds during pregnancy or declining them all-together in low risk pregnancies because they say it's unsafe and harms the baby. What do you think? 
Personally, after a miscarriage and TTC for so long I won't decline them and will probably pay for extra, like a gender scan at 15-16 weeks and 2-3 others throughout my pregnancy to see the baby and calm my nerves, and the ones my midwife orders. If there were conclusive evidence that it is dangerous I would just do a gender scan and then whatever my midwife ordered, but until there's conclusive evidence I don't think I will worry about it. 

Vote below to see results!