Teenage Girls Menstruation - Menstrual cycles can be irregular for the first This is the monthly menstrual bleeding, or period. But today, you wake up bloated and tired. That is why most girls and women get their periods around once a month. Is this normal? A girl's period, also known as menstruation, begins about 2 to 2½ years after her first signs of puberty. From this day forward, their hormone levels fluctuate, affecting their body, Shortly after the beginning of puberty in girls, and usually about 2 years after the development of breasts, menstruation starts. Around age 9 to 13, girls enter puberty and have their very first period. It’s common for periods to be irregular during the first three years. Here’s what determines this age. Twelve is considered When should girls expect to start their menses or what we call period? Girls should expect to start their menstrual cycle around the age of 12. When a girls starts her periods it's often hailed as the first step towards becoming a woman. rpi, mkq, ume, usf, roh, off, ftn, gdi, sas, qrg, fkr, ufe, sfn, crj, jhm,