Addressing some of the most significant claims made above with scientific articles and sources since there's a lot of strong opinions which cast a very negative view on something that actually help families and can be so wonderful.
Egg donation I would see as a related, yet different topic from surrogacy itself, but since @FannyCann brought it up, I will just shortly mention that looking into the impact, there seems to be few follow-ups to check if any/all health issues are because of the egg donation. More info here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4416474/ Advocating for longitudinal follow-up of the health and welfare of egg donors (2014). Woodriff et al. The specific risk of actual severe Ovarian Hyperstimulation Syndrome in assisted reproduction was 0.2-1% as of 2007. But yes, there could be more info and check-ups for those who choose to donate. Anyone who wants to check the facts can see this article with sources (warning for pictures!). www.ncbi.nlm.nih.gov/pmc/articles/PMC9212082/#:~:text=According%20to%20World%20Health%20Organization,stimulation%20cycles%20in%20assisted%20reproduction. Sudden death of an egg donor during oocyte retrieval due to ovarian hyperstimulation syndrome 2022. Tyagi et al.
Still, my personal opinion with two embryos, and I have not in any way claimed to be a professional one, just being a surrogate. Anyone in IVF would need to listen to their clinic's advice, but there are interesting articles regarding amount of embryo transfers and quality of them, but once again, it's obviously needed to listen to their clinic. rbej.biomedcentral.com/articles/10.1186/s12958-022-00899-1#:~:text=Multiple%20pregnancy%20increased%20the%20risks,pregnancies%20following%20ART%20%5B4%5D Comparisons of benefits and risks of single embryo transfer versus double embryo transfer: a systematic review and meta-analysis (2022). Ma et al.
Ensuring surrogates are taken care of and healthy, and not exploited are a basic fundamental. Sadly, that might not always be the case, but it's not true that all surrogates are exploited, and it's a complex issue, and any complex issues, we should not claim all cases to be the same. More interesting reads about it here: https://link.springer.com/article/10.1007/s40609-014-0019-4 Global Surrogacy, Exploitation, Human Rights and International Private Law: A Pragmatic Stance and Policy Recommendations (2014). Bromfield & Rotabi.
Regarding safety risks for the pregnant surrogate, I had no complications. Instead I had a great pregnancy and birth, but again, only speaking for myself and based on my own experience as an actual gestational surrogate. Studies seem divided, but this article from 2021 went in-depth regarding this (you will need an account to read the whole article, but the review is openly available). Is a Surrogate Pregnancy a High-Risk Pregnancy? 2021. Amorado et al. https://journals.lww.com/obgynsurvey/Abstract/2021/05000/Is_a_Surrogate_Pregnancy_a_High_Risk_Pregnancy_.20.aspx#:~:text=for%20pregnancy%20complications.-,Summary,risk%20for%20a%20placenta%20previa.
About child trafficking, I will just quickly mention this article: www.antitraffickingreview.org/index.php/atrjournal/article/view/542/416 View of Commercial Gestational Surrogacy: Unravelling the threads between reproductive tourism and child trafficking: Anti-Trafficking Review (2021). Hyder-Rahman.
Unfortunately, clearly, surrogacy is a somewhat toxic and very opinionated topic. Again, any who wants to get a surrogate should feel free to do so as long as that doesn't hurt anyone else. I apologise to anyone if I need to clarify the essential humanity of not exploiting or harming another person in that process. As a surrogate myself, I couldn't support it more and it's sometimes the only way for parents who are not able or allowed otherwise.
I tried to remove myself from these discussions because of the unnecessary, many times incorrect, and repulsive comments in these forums, but I needed to clarify at least some of the allegations made here. Hopefully all these comments will not discourage people from starting a family. Good luck!