You may need to ask your teenage daughter to put anti-pollution mask before stepping out in open as extremely small particles of pollution have the potential to cause her irregular menstrual cycle finds a recent study. According to experts from Boston University in Massachusetts U.S. the negative health effects from air pollution exposure are infertility metabolic syndrome and polycystic ovary syndrome. The study claims to be the first to show that exposure to air pollution among teenage girls (ages 14-18) is linked to slightly increased chances of menstrual irregularity and longer time to achieve such regularity in high school and