The number of periods a girl can miss varies, especially during the initial years after menstruation begins.
According to the provided reference, a girl's period can be irregular for the first 2 years. Here's a breakdown of how many months a girl can miss her period, particularly in the initial stages:
- Between the first and second periods: Up to 6 months.
- Between the second and third periods: Up to 4 months.
It is important to note that this irregularity is generally considered normal during the first two years after menstruation starts.