(CNN) Jobs that involve heavy lifting on a regular basis could reduce a woman's fertility, particularly among overweight and obese women, a new study shows. This reduction in mature eggs was even greater in women who were also overweight, obese or over the age of 37. People who worked nights or rotating shifts in the new study also saw a reduction in the number of mature eggs. Shift work has been proven to have a range of negative consequences on health, including increased risk of heart disease and obesity. "Shift work is not a biologically good way to work," said Sutcliffe.

Source: CNN February 07, 2017 23:34 UTC