The embryo implanted in gestational surrogacy faces precisely the same hazards as anyone applying IVF would. Preimplantation challenges in the embryo consist of unintentional epigenetic consequences, affect of media which the embryo is cultured on, and unwanted repercussions of invasive manipulation from the embryo. The Catholic Church is against surrogacy, https://digitalasset.blob.core.windows.net/digitalassets/SouthernCaliforniaSurrogacy/Becoming-A-Surrogate-In-Southern-California.html