Early periods may be caused by lifestyle changes like stress, which alter your hormone production. Early periods can also be caused by underlying conditions like PCOS and endometriosis. Age-related ...

Add Yahoo as a preferred source to see more of our stories on Google. There’s nothing more annoying than being caught unawares by Aunt Flo—so when your body and your period tracker aren’t in agreement ...

Frances Gatta is a freelance health writer with experience covering health care technology, general health, mental health, femtech and personalized nutrition for companies and publications like Oura, ...

A period that shows up two weeks ahead of schedule can feel like a red flag, but timing alone does not always signal trouble. Cycles shift for all kinds of reasons—some meaningful, some just part of ...

Having a period come early is just as nerve-racking as it is showing up two or three days late. While you may initially feel overwhelmed trying to figure out why this might happen (Did I miss a ...

Girls in the U.S. are getting their first period earlier than in decades past. Researchers say there are multiple factors causing early puberty, including obesity and environmental pollutants. Girls ...

There are several ways to tell when a period is due. Many people experience a range of physical and emotional symptoms before their period starts, known as premenstrual syndrome (PMS), as their ...