A study by the Eunice Kennedy Shriver National Institute of Child Health and Human Development suggests that obesity during pregnancy may directly lead to fetal overgrowth.
Considered separately from its health consequences – such as diabetes – obesity during pregnancy may lead to the birth of an atypically large baby. This is known as macrosomia.
These results continue to emphasize the importance of having a healthy weight before pregnancy. Macrosomia, common amongst infants of obese women, increases the risk of bone fracture during delivery and the need for a c-section. It can also have negative effects on the mother.
Read more about the study in this ScienceDaily article: