Girls typically reach a weight of around 45 kg (100 lb) which can trigger the onset of puberty.
While the average age for puberty in girls is between 11 and 14 years, weight plays a crucial role in its initiation. Reaching a certain body mass signals to the body that there are sufficient energy reserves to support the developmental changes associated with puberty, including menstruation. It is important to note, however, that this is a general guideline, and other factors such as genetics, nutrition, and overall health also significantly influence the timing of puberty. A girl's weight is just one of many factors that contribute to the onset of puberty.
