Visitor's opinion: I understand people wanting to pass on their blood line. But adopting is also an option as it gives orphan children new parents, and parents a child.
Blood relation is important, but accepting someone else's child as your own, and making him feel the same is much more great.
Lastly, I would like to say that there are many women regretting the surrogacy process because she was deprived of her right to be called a mother, and they are disrespected in certain societies. So, it should be banned.