Textiles have such an important bearing on our daily lives that everyone should know something about the basics of fibres and their properties. Textile fibres are used for a wide range of applications such as covering, warmth, personal adornment and even to display personal wealth.
Most girls start to menstruate between ages 10 and 15 years. The average age is 12, but every girl's body has its own schedule. Although there's no one right age for a girl to get her period, there are some clues that menstruation will start soon. Typically, a girl gets her period about 2 years after her breasts start to develop. Another sign is vaginal discharge fluid (sort of like mucus) that a girl might see or feel on her underwear.
Even in the last three decades, children (particularly girls) are maturing at younger and younger ages (precocious puberty is 10 times more common in girls than in boys). Puberty, Once the Norm at Age 15, Now Occurring in 7-, 8- and 9-Year-Olds In the 19th century the onset of menstruation occurred around the age of 15. Now the average age of the first period, or menarche, is around 12. The time during and before puberty is one of rapid development and change, which is why even months matter when it comes to first menstruation. Before menstruation, girls will show beginning signs of development, such as breast budding and growth of pubic hair.