Should a 12-year-old girl weigh only 50 pounds?

It is not possible to determine whether a 12-year-old girl should weigh only 50 pounds without more information. Many factors can affect a child's weight, including genetics, height, activity level, and overall health. Therefore, it is essential to consult with a doctor or other health professional to assess the child's overall health and growth patterns to determine whether their weight is appropriate for their age and size.