There are multiple factors that can contribute to IUGR, including:
Placental Insufficiency: The placenta is not able to deliver enough oxygen and nutrients to the fetus. Maternal Factors: Conditions such as preeclampsia, chronic hypertension, malnutrition, and substance abuse. Fetal Factors: Genetic disorders, congenital anomalies, and infections like cytomegalovirus or toxoplasmosis. Environmental Factors: Exposure to harmful substances like tobacco, alcohol, and certain medications.