Obesity observed in young women, not only predisposes them to face a higher prevalence of chronic diseases, but it also increases the risk of infertility, besides the risk of developing complications in pregnancy and/or the presence of an abnormal fetal development. This yields both, medical and psychological complications due to infertility, as well as neonatal, obstetric or congenital anomalies and metabolic changes during pregnancy. Furthermore, this influences the future health status of women, as well as their child development.