Inclusion Criteria:  Between the ages of 18-40 years Gestational age between 320/7 - 396/7 weeks Singleton pregnancy For the FGR group: estimated fetal weight <10th percentile For the control group: being healthy pregnant Intact amniotic membrane  Exclusion Criteria:  Multiple pregnancies Cardiovascular disease Chronic hypertension Autoimmune disease Intrahepatic cholestasis of pregnancy Preeclampsia-eclampsia Sepsis Placenta accreta spectrum Abnormalities of placenta The chromosomal or congenital structural anomaly of the fetus Smoking BMI >30 kg/m2