发育正常的女孩子,长到十三、四岁,在生理上最突出的变化就是月经来潮。青春少女月经初潮常会感到恐慌、害羞,或是不知所措,怕让别人知道而难为情。 月经是每个女性的正常生理现象,“初潮”标志着少女开始进入性生理发育过程的第一关。一般来说,月经为28～30天来一次,月经期持续约3～6天。有些女孩在月经来潮前或月经期间,可能有轻度的小腹胀满 The normal development of girls, up to thirteen, four years old, the most prominent physiological change is menstrual cramps. Young girls often feel menarche, panic, shy, or overwhelmed, afraid to let others know embarrassed. Menstruation is a normal physiological phenomenon in every woman, and “menarche” marks the first step in the process of sexual initiation. In general, menstruation once for 28 to 30 days, menstrual period lasts about 3 to 6 days. Some girls may have mild abdominal fullness before or during menstruation