Carrie was nursed poorly and she was thus underweight. Her motor and cognitive development had also been slow. Eventually, she regained her appetite and had put on some weight. She soon became heavier than she should be at her age and had developed compulsive behaviour: skin picking, collecting and lining up objects etc. She would eat everything she could get her hands on at school and at home. From her designated meals to leftovers to pieces of scrap food thrown into the garbage. A specialist diagnosed her condition and limited her caloric intake to 1200 calories a day. She was appointed a monitor to keep her on track at school. Carrie has been diagnosed with prader-willi syndrome caused by a deletion of several genes on chromosome 15 that are involved in the production of proteins that regulate the functioning of the hypothalamus. This is caused by random accidents in the production of sperm cells.