Introduction: Placental maturation in the form of calcification is a normal phenomenon as the gestation advances. It is seen as Grade III placental morphology on antenatal ultrasound. However, if these changes occur early in gestation, it may be a sign of certain pathologies that are linked to placental ischemia like preeclampsia and fetal growth restriction.Aims and Objectives: This study aimed to study the correlation of early placental maturation with adverse perinatal outcomes. Material and Methods:This retrospective study was conducted over a period of two years based on the case records of women delivering in the hospital who fulfilled the inclusion criteria. The women under study were divided into two groups (Group A with Grade I/II placenta and Group B with Grade III placenta based on their placental maturity between 28-36 weeks. The maternal and fetal outcomes of pregnancy were compared between the two groups.Results:There were total 168 women in the study and 52 had Grade III placenta. Preeclampsia and fetal growth restriction was seen in 9.6% and 15.4% of women with Grade III placenta compared to 0.9% and 4.3% in women with Grade I/II placenta. Gestational diabetes and obstetric cholestasis were seen in equal number of women, being 4.3% and 3.8% women in Group A and Group B respectively. Women with Grade III placenta had 21.6% women delivering by LSCS for foetal distress while it was 6.9% in women with Grade I/II placenta. Preterm birth and low birth weight was seen in 15.4% and 19.2% women with Grade III placenta when compared to 4.8% and 3.4% in women with Grade I/II placenta. There was no case of placental abruption, stillbirth or NICU admission in the study group.Conclusion:The use of placental morphology and maturity on antenatal ultrasound can serve as a useful adjunct to monitor pregnancies for development of perinatal complications and planning management in such pregnancies.