There is no evidence a baby is traumatised by being placed on a different woman from birth, in fact the opposite is true, people can google it, as so many babies have been born through surrogacy now the evidence so far suggests these children are actually cherished more and the bond closer between mother and child.
No evidence to suggest they aren't traumatised or bond closer either. This is just an opinion which, granted, we are all sharing. Here is an actual experience of being a child born of surrogacy
And for more
There are decades of study and research into the mother/baby bond during and after pregnancy which has established that a newborn knows their mother's voice, heartbeat and smell. From "The Primal Wound" to attachment theory, you may not subscribe to the views expressed but there are studies, but please do share what you find in Google to prove this research null and void.
As mentioned on the other - now deleted thread so forgive me for repeating myself - that we apply medical science as a measurement and assessment in fertility but we do not apply science in assessment of grief and other emotions (though we can apply scientific methods), we don't need science to predict that a child losing its mother will have a detrimental emotional impact and it's not disputed that a newborn who cannot be with his or her (or their, multiples are common in gestational surrogacy due to the number of embryos implanted) for whatever reason - emergency surgery or worse - will sense their absence, be very unhappy and unsettled and difficult to settle with others.
In Breeders (Amazon Prime) a surrogate mother described how she didn't see her daughter for months but when she held her she immediately stopped crying and fell asleep. Maybe she was tired but maybe she knew it was her mother from her smell and felt huge relief and exhaustion having missed her for those months they were apart.
Put simply, newborn babies are, as a human species, pretty dependent and 'know' nothing about the family they are born into, but they know their mother, the only home they have ever had until birth.
Rather than put them (and by them I mostly mean the intending mother) through gruelling fertility treatments for years and years, wouldn't it be better to help them come to terms with this?
I agree entirely @Gasp0deTheW0nderD0g
It's amazing what little safeguard there are and what little information (regarding risks of from the hormones and other drugs) is shared in terms of reproductive cancers.
Though focused on the fertility industry in Australia you might enjoy The Fertility Business on Amazon Prime - trailer here
https://www.amazon.co.uk/Fertility-Business-Jaya-Balendra/dp/B07C12HH4N