It is normal for a child to be 14 years old and not have her period. Normal Chinese girls generally begin to develop their reproductive systems after the age of 13, ushering in the second growth spurt of their lives, which is called puberty. The onset of puberty is slightly different for each child, depending on her body type. If your child’s breasts have not yet developed, he or she will not have a period. If your child’s breasts have developed but he or she has not yet had a period, you can wait and see. You can take your child to the hospital to check for congenital diseases, such as congenital vaginal atresia or stenosis, which can be treated with surgery.