You might want to send your daughter to a chiropractor. I know this woman who was 26 and had not had her period since 8th grade. The doctor found a problem in her spine and 2 weeks later had her first period in a long time. She said that the nerves going to her uterus were not able to send the right information to the uterus so that she could have her period. If you have questions about this let me know.