For surrogate pregnancies in which only one baby is born, the preterm birth charge in surrogacy is marginally decreased than toddlers born from regular IVF (11.5% vs 14%). Babies born from surrogacy also have related normal gestational age as infants born through in vitro fertilization and oocyte donation; around weeks. https://cloudasset.s3.amazonaws.com/SouthernCaliforniaSurrogacy/Becoming-A-Surrogate-In-Southern-California.html