There isn't one, only periods of varying probability. 19% of all people relying on "safe" periods gets pregnant within one year. It's pretty much the Russian Roulette approach to becoming a parent.
28 Days
The menstrual cycle varies between women. It usually lasts between 3-7 days.
A typical menstrual cycle lasts between three and five days, however the time period between two and seven days is typical as well. If a woman experiences a menstrual cycle lasting more than seven days, then she should seek medical attention.
Uh. What the heck. You not know 'bout that? Duurr. Urgh. :"<
There is no 'safe' period. Pregnancy can occur at any time during your menstrual cycle.
When you ovulate depends on your menstrual cycle. You ovulate two weeks BEFORE your period, so how soon after your period you ovulate depends on how long your menstrual cycle is.
In Islam, one can pray after completing the menstrual period, which typically lasts for about 3 to 7 days.
Irregular menstrual period means a period which is not a set number of days, it may be only a couple of days one cycle and then weeks the next. Irregular menstrual periods can also see irregular flow patterns so light then heavy one cycle, heavy all the way through the period of the next cycle.
A woman is typically considered fertile during the ovulation period, which usually occurs about 14 days before her next menstrual period. This means she can be fertile approximately 5 days before ovulation and 1 day after, resulting in a fertility window of about 6 days. Overall, this places the fertile window around days 10 to 16 of a typical 28-day menstrual cycle, though this can vary based on individual cycle lengths.
The average menstrual cycle is 28 days. Five days for the menstrual phase (when a woman's endometrium is being expelled, also known as a period), nine days for the proliferative phase (when the endometrium is developing), zero days for ovulation (when a ripe ova, or egg cell, is deposited from an ovary), and fourteen days for the secretory phase (when the endometrium continues to develop.
It varies from woman to woman, but is usually between 2 and 7 days.
Vaginal bleeding can average anywhere from a week to 6 weeks depending on whether a woman has given birth or in between monthly menstrual cycles.