What causes large placentas?

Large placentas, or placentomegaly, can be caused by several factors, including maternal Diabetes, which increases fetal growth and nutrient supply. Other causes include multiple gestations (twins or more), certain infections, and genetic conditions affecting the fetus. Additionally, placental tumors or abnormalities can contribute to an enlarged placenta. It is essential for healthcare providers to monitor placental size as it may impact pregnancy outcomes.