As part of the globally diversified company CARLISLEÂ® Companies Inc. , the CARLISLEÂ® Construction Materials Europe Group ( CARLISLEÂ® CM Europe ) is particularly focused on the European market and is the comprehensive specialist in high-quality , high-tech elastomer products for the long-life waterproofing of roofs , structures and cladding systems ...
Most girls get their periods somewhere between the ages of 9 and 16. But it's not unheard of for a girl's period to start before age 9. Rather than age, you can look for signals in your body. Most girls don't get their period until they weigh at least 100 pounds and have started developing breasts.
The 20th Century. Average Age: 12-13. In 1928, Howard Kelly, a gynecology professor at John Hopkins University, claimed that the average age to get your period for American girls was 13.9. Surveys of British teens in the 1950s and '60s found that they typically got their first period around 13.5 years of age.