What are the advantages/disadvantages to surrogacy or egg donation?

Numerous for both: Egg donors and surrogates used for different reasons. Egg donors for women w/poor eggs: advantage is success, disadvantage is someone else's eggs (and costs). Surrogate used when woman cannot be pregnant herself. Advantage: baby vs no baby; disadvantage: other woman involved and costs. Both topics too broad to answer well here. Great options when used appropriately. Costs are relative but high.