0-5 days are normal, if longer, see your doctor.
If you mean how Many days are there between a girls periods , there are 28
There can be many reasons for your period to be delayed. The most common reasons for delayed menstruation are stress or ill-health - if you're unwell your body recognises that getting pregnant may be a bad idea so it will delay or skip ovulation, which in turn leads to your period being delayed or it will skip that cycle. Delayed periods are also common if you're in your teens due to cycle irregularity - it takes time to reach a point where you are physically and sexually mature enough to ovulate on a regular basis, and changes to your body as you're going through puberty can have a major effect on your cycles and so result in delayed menstruation. Sometimes periods may seem delayed when they're not - the average menstrual cycle is 28 days but everyone's cycles are different, also it's normal for there to be up to 7 days variation between your cycles, so a few days 'late' isn't really late at all.
3 years
14 days before your period starts.
15 days
28 days
28 Days
28 days
A normal period can be 3-7 days long.
Around 28 days but it can be less. Girls usually get it about every 3-4 weeks. But if its your first period sometimes it takes your body time to get used to it so you get it about every 2-6 months depending on your body till it is used to it.
How many days does the month of September have? Enter the number, and put a period after it.:
How many days does the month of September have? Enter the number, and put a period after it.: