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Menstrual cycle length of 21 to 35 or 42 days depending on your source from the start of one period to the start of the next is normal from menarch. Concieved in round 2 first time around and round 4 2nd time around. For the first few years after menstruation begins long cycles are common.
Based on the scan date I probably ovd nearer to day 13 or 14. Interval for high chance of pregnancy. Less than 24 days. The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women and 21 to 31 days in adults. Presuming you are not in this category ovulation in. A menstrual cycle begins with the first day of your period or menstruation MEN-stroo-AY-shuhn and starts over again when the next period begins.
During this phase your uterine lining is shed through your vagina over a period of three to seven days.
The average length is 28 days. Regular cycles indicate that ovulation has occurred What Do Normal Cycles Tell Your Doctor. Menstrual cycles often change as a woman gets older. Not sure 2nd time around the guides said to shorten cycle as appropriate which would have meant ov day 7 or 8. Eighty percent of cycles occur within 21 to 45 days. When does implantation occur.