From the beginning of a period to the beginning of the next one is on average 28 days.
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The first day of your current menstrual cycle (the first day you begin to bleed again) is also your last day of your previous cycle. The average length of the cycle is 28 days. The first day of your current menstrual cycle (the first day you begin to bleed again) is also your last day of your previous cycle. The average length of the cycle is 28 days.
Ovulation generally occurs between day 11 and day 21 of a woman's cycle.
Day 1 is the first day of bleeding. Last day is the day prior to the start of next period. Average cycle is 28 days with an average bleeding duration of 3-5 days.
Generally on or about day 14 of a 28 day cycle you will ovulate. It is important to know that if you are sexually active that sperm will stay alive in the uterus for 5-6 days so if you have sex on day 12 you can get pregnant.
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