Most surrogates are not selfless--- they get paid for what they do...in the US often $60,000. Some jurisdictions do require that women choosing surrogacy have to do it altruistically, receiving only reimbursement for medical expenses. This causes a shortage of surrogates compared to market demand. People looking for surrogates often then travel to jurisdictions where the laws are different to obtain them (I know people personally who have done this). The US is not the only destination, and there are less protections in other markets than in the US. Surrogacy is certainly not prostitution, but poorly regulated markets exist and pose similar issues.
> Poorly regulated markets exist and pose similar issues.
Right, but this sort of applies to anything though. Labour markets, for example. Does the fact that Bangladeshi clothes factories are exploitative of their staff make hiring staff intrinsically immoral in the United States?
> Most surrogates are not selfless--- they get paid for what they do...in the US often $60,000.
Including the lead-up and recovery period to take the whole process to a year or so, and accepting your very high estimate of $60k in surrogate compensation, that's hardly a windfall for the average American woman. There's far easier ways to earn $60k in an entire year in the US than carrying someone's baby. For American surrogates, there's usually an element of selflessness involved.
"The last several years have seen significant progress toward the development of an artificial womb which would facilitate the survival and growth of prematurely born fetuses from approximately 23-24 weeks gestation onward."
Seems a long way from eliminating the need for surrogacy.