Is it normal for an 11-year-old girl to have a 14-day interval between her second periods?

Patient's question:

No

Doctor's answer:

Generally speaking, girls start to develop breast enlargement before the age of 11, and pubic hair growth begins around the time they are about 12 years old. The period before the age of 12 is the peak growth phase. The middle period of the age of 12 is the stage of body shape changes. Before the age of 13, armpit hair begins to grow, and the middle period of the age of 13 is the time of menarche.