Bloating, tiredness, abdominal cramps the most common symptoms of menstruation in Apple’s Women Health Study

The study is being conducted in partnership with NIH's National Institute of Environmental Health Services (NIEHS) and the Harvard TH Chan School of Public Health.

from http://www.firstpost.com/health/bloating-tiredness-abdominal-cramps-are-the-most-common-menstrual-symptoms-as-per-apples-women-health-study-9404721.html