i dont think its selfish at all. You are the parent and you will be carrying the baby so thats all that matters.
What did they do in the old days before the ultrasound? Its natures decision anyway.
I can see both sides. And I think the main reason people Do find out the sex is because technology is so readily available. We are in a new age where WE WANT TO KNOW and maybe control everything, including the sex of our baby. So why not right?
I have an ultrasound on Monday and I want to know mainly because everyone has been asking. I get at least 2 calls a week! I really do not care and it would be a great surprise. So I am going to go into my ultrasound and if they cannot see anything then I wont push it. I will be happy with what ever the Lord decides.