Overview:
Obesity during pregnancy is a risk factor for both mother and baby. Gaining a healthy weight during pregnancy through exercise and nutrition protects against short- and long-term consequences.

Aims and Objectives:
This systematic review highlights the causes of obesity, its impact on pregnancy and postpartum health of the mother and the newborn.

Method:
This study is a systematic review of the literature with quantitative and qualitative research that includes randomized clinical trials and observational studies for the period from 2019- 2024. The search was conducted through the electronic databases Pub Med and Google Scholar and concerned only studies that were in English and had free access.

Results:
The findings showed serious consequences of obesity in pregnancy such as hypertension, preeclampsia, gestational diabetes mellitus, increased cesarean section and maternal mortality after childbirth, mental health issues, breastfeeding difficulties, infertility and fertility problems. Also, large-for-gestational-age babies, increased risk of childhood obesity later in life.

Conclusion:
Obesity in pregnancy is influenced by the family and social environment, is related to lifestyle and education, genetic and hereditary factors that affect the biophysical profile of the pregnant woman. Regardless of its causes, obesity in pregnancy affects the mode of delivery, fetal development, forms pathological conditions that increase the risk of premature birth, has effects on breastfeeding, on the weight of the woman and the newborn after the completion of childbirth.