In order to establish a biological connection to their child, intended parents may elect to use IVF. Through this process they can use their own eggs and/or sperm. Or they may also use an egg and/or sperm donor if desired. In IVF, the eggs are fertilized in an IVF facility outside of the surrogate’s body. When fertilized, the embryo (or embryos) is transferred to the surrogate body. Once it is approved that the carrier’s body is responding favorably, the doctor will approve medications to cease so the pregnancy can progress naturally.