Here is the translation of the given content into English: "Open the scripture, but from the beginning of this issue to now, what is the reason the scripture is like this?"

Patient's question:

At the age of 15, I have been menstruating for 2 years. Since April of this year, I haven't had my period again, and I don't have any other symptoms. My mother's menstruation has always been very regular, so there is no genetic factor involved.

Doctor's answer:

Some teenagers have irregular menstrual cycles, sometimes not having a period for several months. In most cases, irregular menstruation during puberty is not caused by a disease but is a normal phenomenon.
After the first menstrual period, ovulation may not occur for 1-2 years, and menstruation can be irregular. For some people, this period can even extend to 4 years. Some individuals who have developed a relatively regular menstrual cycle may suddenly stop having periods for 2-3 months, followed by menstruation with a heavier flow. In such cases, it is best to visit a hospital for examination and to identify the cause. If necessary, a doctor can help establish a normal menstrual cycle.