This depends on the type of surrogacy. When it is traditional surrogacy where the egg from the surrogate mother is used, the surrogate mother has genetic ties to the child and pass on DNA. In the case of gestational surrogacy, the surrogate mother does not pass DNA since an embryo/fertilized egg from another woman (the real mother or a donor) is planted in the uterus directly. There is possibility, however, that some DNA can be transferred from the surrogate mother to the fetus and vice versa, but this has almost no effect in the DNA of the child as the few cells will hide amongst the trillions of original cells from the real parents of the child. Egg Donation
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