Missed or late periods happen for many reasons other than pregnancy. Common causes can range from hormonal imbalances to serious medical conditions. There are also two times in a woman's life when it's totally normal for her period to be irregular: when it first begins, and when menopause starts.

How much delay is normal in periods?

A period that starts between one and four days earlier or later than expected is considered normal. Most periods last between three and five days, but a period anywhere between three and seven days long is also considered normal.

What to eat if period is not coming?