Can obesity cause pregnancy complications?

Obesity has been found to increase the chance for gestational diabetes and high blood pressure during pregnancy. Obesity might also cause an increased chance of premature delivery (babies born before 37 weeks of pregnancy) and stillbirth. Also, babies of mothers with obesity are at an increased chance for large body size (macrosomia) which can make delivery more complicated and increases the chance for obesity in childhood and as an adult. Obesity has also been associated with a greater chance for a cesarean section (c-delivery).