I was going to pay $50 for an gender reveal ultrasound but my doctor told me not to waste my money…

I was going to pay $50 for an gender reveal ultrasound but my doctor told me not to waste my money because I am going to have so many ultrasounds that I will know their genders before 18 weeks anyway. I had an ultrasound Tuesday but I am also going to have another ultrasound and chromosomal blood work this coming Tuesday. They said that they can tell the genders between 12 weeks and 18 weeks so I am hoping that I find out Tuesday what we're having.