Before puberty ​ — the age at which signs of sexual maturing begin to appear — ​ a daughter needs to know about the changes that will occur in her body and to understand why and how menstruation takes place.
Бас эрэгтэй хүүхдэд ч шөнийн шижин буюу нойтон зүүдний талаар урьдчилан тайлбарлах шаардлагатай.