In gestational surrogacy, the embryo carried by the surrogate is created via IVF using gametes from which source?

• A. The surrogate's eggs fertilized by the partner's sperm
• B. The surrogate's own eggs are used with donor sperm
• C. Donor eggs and donor sperm unrelated to the contracting couple
• D. The contracting couple's eggs and sperm

Answer: (D)

In gestational surrogacy, the embryo carried by the surrogate is created using the contracting couple’s gametes, so the child is genetically related to the intended parents. The surrogate simply carries and gestates the embryo, not contributes genetically.

This is why using the contracting couple’s eggs and sperm is the scenario described: IVF combines those gametes to form the embryo, which is then transferred to the surrogate’s uterus. Other options involve the surrogate’s own eggs or donor gametes, which would make the child genetically related to the surrogate or to donors rather than to the contracting couple.