The present degree project is a study that deals with nutritional disorders in pregnant adolescents. This group of patients with nutritional complications are those young women who since childhood have had a poor diet and even their bodies have not reached the full development that a woman's body should have in order to have a baby, As a result, children are born with anaemia, malnutrition or macrosomia and the mother is left in very bad conditions. If this is added to the fact that the adolescent girl does not breastfeed very often, since most of them have to continue with their studies, she is giving a poor diet to the future children of our canton. In the Balzar Hospital we were able to carry out this research work in which we carried out a survey of pregnant adolescents who presented some type of nutritional disorder such as being overweight or underweight. During prenatal check-ups we provided nutritional advice, gradually changing their eating habits, measuring their height, weight, BMI, laboratory tests, and we gave talks to adolescents and their families.