About 28 days.
You should get your period once every month. Your menstrual cycle should be about 28 days. This means that there should be about 28 days from the first day of your period to the first day of your next period. 28 days is an average number, but anywhere between 21 and 35 days is normal. Your period will usually last between 3 and 7 days. The amount of blood flow you have will probably be different each day. Periods too far apart. You may only get your period 3-4 times a year, instead of once a month. If you are having your periods only a few times a year, this may be because of stress, intense exercise, weight loss, or diet. 1 The average menstrual cycle lasts 23-35 days (counting from the first day of one period to the next). 2  Some women may not have a regular cycle (number of days between periods). 3  This is normal, especially in the first 2 years after a woman's first period. 4  Most women have their period for about 6 days. 1 This is normal, especially in the first 2 years after a woman's first period. 2  Most women have their period for about 6 days. 3  Some may have it fewer than 6 days and some may have it for more than 6 days. A menstrual cycle is the time from the day a menstrual period starts to the time the next period starts. The average menstrual cycle is 28 days long. However, a normal cycle can be shorter or longer than this. It may be anywhere from 21 to 35 days long. Most periods last 3 to 5 days, but anywhere from 2 to 7 days is normal. Not really. The average woman's menstrual cycle is 28 days long, and the average period lasts for three to five days, but there can be huge menstrual cycle variations from woman to woman.  Your first day of your period to the first day of you next period should be between 28-32 days. Thanks for using ChaCha! [ Source: http://www.chacha.com/question/how-many-days-apart-are-your-periods ]. http://wiki.answers.com/Q/How_many_days_do_your_period_be_apart. This depends on how long your menstral cycle is. The usual cycle is 28 days long. Day one of the cycle is the first day of your period. But, anywhere from 2 to 7 days is normal. For the first few years after menstruation begins, longer cycles are common. A woman's cycle tends to shorten and become more regular with age. Most of the time, periods will be in the range of 21 to 35 days apart. A cycle is counted from the first day of 1 period to the first day of the next period. The average menstrual cycle is 28 days long. Cycles can range anywhere from 21 to 35 days in adults and from 21 to 45 days in young teens. The rise and fall of levels of hormones during the month control the menstrual cycle. This depends on how long your menstrual cycle is. The usual cycle is 28 days long. Day one of the cycle is the first day of your period. If your period lasts for five days then take five away from 28 and you will have 23 days before your next period starts. Some people could have a 32 day cycle and some could have 24 a day cycle or anything between. Also, some women bleed for 2 days only and some bleed for 5 or 6 days so you could have a 24 day cycle and bleed for 6 days. This would mean that you will have 18 days between periods, or, you could have a 32 day cycle but only bleed for 2 days. On average, a woman's cycle normally is between 28-32 days, but some women may have much shorter cycles or much longer ones. Ovulation can be calculated by starting with the day the last menstrual period (LMP) starts or by calculating 12-16 days from the next expected period.  A: 28 days is just an average. very, very few women have periods that are always 28 days apart. anywhere between 21 and 40 days could be normal for you!start counting on the first day of bleeding--this is the first day of a new cycle. so if your last period started on feb. 2, that is day 1. count forward from there. http://wiki.answers.com/Q/How_many_days_do_your_period_be_apart. This depends on how long your menstral cycle is. The usual cycle is 28 days long. Day one of the cycle is the first day of your period.
http://youngwomenshealth.org/2010/04/21/menstrual-periods/ http://www.virtualpediatrichospital.org/patients/cqqa/period.shtml http://www.summitmedicalgroup.com/library/pediatric_health/hhg_period_late_or_missed/ http://www.webmd.com/women/features/when-your-period-signals-problem http://www.themedicalquestions.com/women/how-many-days-apart-are-your-periods.html http://www.womenshealth.gov/publications/our-publications/fact-sheet/menstruation.html http://www.answers.com/Q/How_many_days_do_your_period_be_apart http://netwellness.org/healthtopics/pregnancy/pregmenstrualcycle.cfm http://www.themedicalquestions.com/women/how-many-days-apart-are-your-periods.html
how far apart should a woman period be