The uterus is the female reproductive organ in which the gestation of human beings and other mammals occurs. It is a hollow, triangular shaped muscular organ, located in the pelvic cavity, in front of the rectum and behind the urinary bladder. Its length is about eight centimeters and its width of five centimeters. It has an ovary on each of its sides, an organ in which hormones and ovums are produced, the female sex cells, which reach the uterus through the fallopian tubes. The uterus is the organ in charge of pregnancy. The ovaries produce the ovules, which travel through the fallopian tubes. Once the ovum leaves the ovary it can be fertilized and implanted in the wall of the uterus. Its main function is to hold the fertilized ovum and offer the optimal conditions for the embryo to develop inside.
This is very typical of how an eating disorder can start out. The person begins to make changes to their eating habits, slight changes at first that might not even be noticeable to other people, then those changes become bigger and more noticeable as they escalate into what becomes an actual eating disorder.