Obesity and Genetics: Women who are overweight may also see an increase in facial hair. Fat traps androgens, creating a hormonal imbalance. Because weight gain and facial hair are a sign of other conditions and disorders, women should be thoroughly examined by a doctor to make certain that there are no other underlying medical issues. Along with other physical characteristics, ancestry and genetics plays a role in whether women have facial hair. If your grandmother and mother had to pluck their chins, chances are you will, too.