Many women do not have exact cycles, but rather are in a range such as 28-30 days or 30-33 days or 27-29 days. Few women have predictable, like clockwork cycles. The reason for this is that everything related to menstrual cycles is controlled by hormones.
https://answers.yahoo.com/question/index?qid=20090514145858AAkjvwI
Best Answer: When discussing menstrual cycles, you have to talk in averages since every woman has their own unique cycle. An average menstrual cycle is considered to be 28 days long counted from the first day of one period until the first day of the next period. On average, ovulation will take place 14 days before the start of the next cycle, which in a 28 day cycle happens to be 14 days after the start of the last cycle.
https://answers.yahoo.com/question/index?qid=20090514145858AAkjvwI
im confused. if i had sex a week BEFORE my period and just two days before as well could i have been ovulating? its been about 2 and half weeks and my right breast hurts a bit off n on and feels heavy.
https://answers.yahoo.com/question/index?qid=20090514145858AAkjvwI
Unless you're a very early ovulator (the average timing for ovulation is 14 days before the start of your period -- track yours by using a basal body temperature chart or an ovulation predictor kit), there's little chance your man's sperm will actually have any eggs to work with during this phase of your cycle.
http://www.parents.com/getting-pregnant/trying-to-conceive/ovulation-getting-pregnant/
Welcome to prime time for conception! No matter how long your periods are, ovulation generally starts about 14 days before your next scheduled period. When it happens, your body temperature rises about a half a degree. But bear in mind that this takes place after you're already ovulating, which could be too late.
http://www.parents.com/getting-pregnant/trying-to-conceive/ovulation-getting-pregnant/
Your odds of conceiving: High, if you have sex within 36 hours. Any eggs that are released live no longer than 12 hours. In fact, it's best if his swimmers meet your egg within four to six hours of its release.
http://www.parents.com/getting-pregnant/trying-to-conceive/ovulation-getting-pregnant/
During my ovulation time, how many days am I really fertile? During your window of ovulation, an egg is only available to be fertilized for about 12-24 hours. But since sperm can live in the body for 3-5 days after sex, and the egg is available for one day, your most fertile time is considered to be about 5-7 days.
http://americanpregnancy.org/getting-pregnant/ovulation-faq/
The number of days in your cycle is calculated by counting the number of days from the beginning of one period to the beginning of the next period. If you have a short cycle, for example 21 days, and you bleed for 7 days, then you could ovulate right after your period.
http://americanpregnancy.org/getting-pregnant/ovulation-faq/
Also known as the luteal phase, this final portion of your cycle lasts a minimum of 12 days and as many as 16. Progesterone starts to rise, signaling that the ovaries don't need to release any more eggs this month.
http://www.parents.com/getting-pregnant/trying-to-conceive/ovulation-getting-pregnant/
The Association estimates that ovulation occurs anywhere between 11-21 days after the first day of your last menstrual period (LMP), or 12-16 days from when you expect the next menstrual period to start. Order a Fertility Kit or Monitor.
http://americanpregnancy.org/getting-pregnant/ovulation-faq/
how many days before your period
There are 28 days before your period.