The Immorality of Surrogacy

I want to ask you why surrogacy is immoral. I think that if we did invent artificial wombs, it would be immoral to take a child out of the womb just because a woman no longer wanted to be pregnant. Child has a right to not come into existence through an act of fornication, prostitution, adultery. On a facial insemination. That would be if you're using another person's another person's sperm to impregnate a wife.