Relationship between Serum Leptin Values and Abdominal Circumference Assessed in the First Trimester of Pregnancy in Obese Women.

Higher serum leptin values have been correlated with several complications of pregnancy, while the abdominal circumference (AC) is an anthropometric measurement usually used to diagnose abdominal obesity. For this study we compared serum leptin levels between two groups of pregnant women: those with abdominal obesity (AC>88cm) and those without abdominal obesity (AC<88cm), diagnosed at the beginning of pregnancy. Serum leptin levels were obtained through measurements performed between 11-14 and 28-32 weeks of gestation. Higher serum leptin levels were found in the group of pregnant women with abdominal obesity comparing to the group without abdominal obesity, but a positive correlation between abdominal circumference and the leptin values was found only at 11-14 weeks of pregnancy. Our study showed that a simple measurement of AC performed at the beginning of pregnancy may predict the average serum levels of leptin throughout the gestation period. A better understanding of the role of leptin during development is needed to make us able to know how maternal-placental-fetal leptin exchange influence the fetal development.