Sadie is a 37-year-old teacher in her 20th week of pregnancy. she is 68 inches tall and weighs 195 pounds. her pre-pregnancy weight was 180 pounds. during her first pregnancy two years ago, she gained 50 pounds. she gave birth to an infant weighing 9 pounds, 2 ounces. her doctor has recommended that she limit her weight gain during this pregnancy. she likes to swim but has not been exercising regularly since she found out she was pregnant. she has had morning sickness through much of this pregnancy and says that she feels better when she eats starchy foods such as white bread, potato chips, and refined pasta. she complains of recent problems with constipation and is seeking ways to relieve her discomfort. 1. calculate sadie's body mass index (bmi) based on her pre-pregnancy weight.