The average menstrual cycle (the day your period starts to the first day of your next period) is between 25 and 30 days, but it can range from 21 to 35 days or more and still be considered normal.

The average menstrual cycle lasts about 28 days, but it can vary from person to person. Keeping track of periods can help a person determine the length of their cycle and recognize any irregularities.

5. Miscalculation. Unless you're tracking your period, it’s likely that you don’t notice if it's a day or two out. The typical cycle is 28 days long, but many women’s cycles are actually ...

Typically, a "menstrual cycle can be anywhere from 21 to 35 days," Dr. Angela Jones, ... "Traveling, particularly changing time zones, can also make your period a few days late.

Plan B may make your period late or change its flow for one menstrual cycle. Any irregularities after that may indicate pregnancy or another cause.

Scientifically, a period is considered to be late or delayed if it has been more than 30 days since your last menstrual cycle ended, and you do not have any hormonal or health condition which ...

There's no need to panic if you miss a period—it doesn't necessarily mean you're pregnant. Doctors explain 11 reasons for a late period, like stress and PCOS.

Determining how late your period is depends on what your cycle looks like. If you get yours every 28 days consistently, your period may be considered late if it's delayed three or more days.

As a result, your cycle might start a couple of days earlier or later than usual. “Most people will get their period within seven days of the expected time, with less than 10% of people ...

Missed periods aren't the most fun. Most of you will have been there; you notice your period is days late and immediately jump to the conclusion that you're pregnant. Even if you've not had sex in ...