A 26-year-old female client presents at 10 weeks' gestation. She currently is a G3 1-0-1-1. Her mother and grandmother have heart disease. Her grandmother also has insulin-dependent diabetes. The client's previous delivery was a term female infant weighing 9 lb 13 oz. The client is 5 ft 6 inches tall and her current weight is 130 lb. Based on her history, she is at risk for developing diabetes in pregnancy. Which of the following factors places her at risk for gestational diabetes?