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?

“On average, these cycles are 24 to 38 days long.” That means that a 28-day cycle one month and a 26-day cycle the next month is probably nothing to worry about. Your period might be considered late if: It's been more than 38 days since your last period.

Is it to worry if periods get delayed?

It is important for a person to see a doctor if they have missed more than three periods in a row. A variety of factors can disrupt a person's menstrual cycle. Periods may come back on their own, but if delays are persistent, a doctor — such as a gynecologist — should explore the possible causes.