I really struggle with the ethics of surrogacy, what it says about human life and what it says about the value of women.
It is one of those areas where technology has gotten ahead of us without a consensus in public opinion on the ethics. And as it is so new, I think the precautionary principle must apply. I don't know of anybody who says they wish they were a child born by surrogacy.
I think the starting point must be that nobody has the right to have a child. Somebody who wants a child may be prevented by circumstance (gay couples, single people...) or by biology (infertility, hysterectomy...) from having their wish fulfilled. That is heartbreaking and I do not want in any way to minimise the pain of an unfulfilled desire to be a parent. But I have huge ethical concerns with surrogacy as the answer.
Commercial surrogacy or surrogacy for expenses(which, let's face it, can easily be a veil) will always be problematic. There will always be women for whom the lure of desperately-needed money will coerce them into a choice they would not otherwise make.
We don't allow expenses or payment for donating a pint of blood, and we don't lie any possible suggestion of coercion - so for examples blood donation is not permitted in prisons. That's just a pint of blood, the financial value of which would be relatively tiny, and the risks and consequences of donation are minimal and largely very transitory. Yet pregnancy massively increases the risk of death of healthy young women of child-bearing age. And each subsequent pregnancy carries additional risks, the risks for the mother of a fifth pregnancy are much greater than a second.
When it comes down to it, surrogacy implies a degree of control by a third party over a woman's body, placing her at risk of death. I just cannot reconcile myself with that.
Again, I have huge sympathy for the pain of people who are unable to become parents.