1. Early period is badhttp://www.huffingtonpost.in/entry/period-facts_n_4065124
A female's very first period and her life span work together. It can be claimed that it has an impact, however reversely. It is stated that ladies who get their duration later in their teen years are most likely to live past 90 years of age. The later the first duration, more would be a woman's life as per Gita Mishra at the College of Queensland, Australia.
2. After 12 years of agehttp://ecosalon.com/23-thoughts-every-woman-has-during-her-period/
Gita with others researchers came down to a benchmark age of 12; the earliest a woman can be affected according to New Scientist.