Oh, for the love of God. If St. Augustine had had an ultrasound device back in 300 A.D., he’d have been able to nail it down then. Fact is, he didn’t. Fact is, we do. Give me a break!
I am neither a medical doctor nor a theologian, but it does seem plain to me that the morality involved here is in no way dependent upon an ultrasound device, or what one sees with it.