The agency fee is not increased if you wish to have twins. However, the costs for other aspects of the surrogacy do increase accordingly. For example; the surrogate’s living expenses, clothing allowance and monthly allowance just to name a few. Your main concern should be the medical bills associated with a twin pregnancy and birth. Pregnancies with more than one baby are considered “high risk” and preterm delivery is often the result. Babies born prematurely are typically placed in the NICU for monitoring which becomes extremely expensive. The newborn babies are NEVER placed on the surrogate’s insurance and thus baby insurance must be purchased by the parents, which is another cost to take into consideration.