Delayed puberty is more than just a normal variation; it can have serious repercussions if it is not identified in time or treated properly. What Is delayed puberty? Delayed puberty can be defined as the lack of appearance of pubertal changes in girls by age 13 and in boys by age 14. Studies indicate that delayed puberty, affects 2-3% of children in their adolescence, and more cases are reported among boys than girls. Sometimes, delayed puberty is the initial manifestation of a health problem that needs to be addressed.