Such hard drinking can prove fatal. For example, one-third of all fatal car crashes involving alcohol happen among 15 – to 20-year-olds, the record found. ‘The top three causes of mortality in teenagers are automobile accidents, suicides and homicides, and alcohol is strongly connected with each of these,’ Siqueira said. Between 36 % and 50 % of high school students consume alcohol, and 28 % to 60 % report binge drinking, the survey said. But the true picture is actually darker, Siqueira suggested. Those numbers are based on the adult definition of binge consuming – – five or even more beverages in a two-hour period for males, or four or more drinks for women. Because teenagers typically weigh less than adults, they are likely to reach an unsafe blood alcohol concentration faster, Siqueira said. Alcohol isn’t benign, a single expert agreed.For example, the genes that restoration DNA might be able to help repair a few of the damage caused by an environmental aspect, such as for example smoking. But when too much harm accumulates, it causes cells to die, the experts said. Previous research has shown that women who smoke cigarettes enter an average of one or two years earlier menopause, the researchers noted. Dr. Kutluk Oktay, director of the Division of Reproductive Medicine and Institute for Fertility Preservation at New York Medical College in Valhalla, N.Y., called the study significant, and said it expands on previous tests by his team that provided insight into genes and childbearing in females.