Background: Placenta is a functional unit between the mother and the fetus. It is the discoid, deciduate, hemochorial, chorioallantoic, endocrine gland which connects developing embryo by umbilical cord to the uterus. It develops from two sources. The fetal component which is the principal component develops from chorion frondosum and the maternal component from decidua basalis. If the decidual part of the placenta is healthy, the embryogenesis from germinal period up to the end of fetal period will be healthy. Material and Methods: This is a prospective and observational study conducted in the Department of Anatomy at Tertiary care Teaching Hospital from April 2021 to December 2021. Inclusion Criteria: Totally, 90 healthy mothers who gave birth to uncomplicated singleton pregnancy, and their new-born were included in the study. Exclusion Criteria: Subjects with diabetes mellitus, hypertension, anaemia, vascular diseases, and multiple pregnancies were excluded from this study. Results: In present study, newborn body mass index (BMI in kg/m2) was measured. Majority (55.55%) of the newborn were within BMI range of 11-13 kg/m2 followed by 25.57% of the new-born were with BMI >14 kg/m2 and the lesser proportion of 18.88% new- born with BMI <10 kg/m2. The mean placental weight (in gms) for female babies with BMI <10 kg/m2 was 402.23±56.81. The mean placental weight (in gms) for male and female babies with BMI 11-13 kg/m2 were 421.35±58.67 and 501.28±60.84 respectively. In addition, mean placental weight (in gms) for male and female babies with BMI >14 kg/m2 were 569.54±54.37 and 556.76±67.91 respectively. The mean placental diameter (in cms) for female babies with BMI <10 kg/m2 was 19.23±2.68. The mean placental diameter (in cms) for male and female babies were 20.89±2.87 and 21.58±2.76 respectively with BMI of 11-13 kg/m2. Moreover, mean placental diameter (in cms) for male and female babies were 22.61±2.93 and 20.97±2.99 respectively with BMI of >14 kg/m2.Conclusion:This study confirms that morphometric observation of placenta is associated with foetal weight. So, an early examination of not only the fetus, but also the placenta by non-invasive techniques like ultrasonography will be helpful to predict and to avoid low birth weight babies with better preventive measures. This study will also help the obstetricians and researchers to focus on the impact of placenta on new-born BMI.