03-14-2009, 05:24 PM
Sometimes girls don't get it until a later age, but there are times where a girl doesn't develop because she isn't getting the right vitamins. Being severely underweight can result in it(which is why I tell you girls to quit bugging out about weight because I don't think you guys need to be worrying and then get ill from it). She should speak to her mother about it and see if in their family they get it later. If not, she should check in with a doctor.