Answer:
by Konstance McCaffree: ()
Good question. I am glad that you realize that there is no good time. The reason there is no good time is because an extra ovulation might occur at varying times during a menstrual cycle and there is no good way of where in a cycle the actual ovulation occurs. Even for couples who are trying to get pregnant, who use the hormone testing kits that are on the market, it is difficult to determine.
Theoretically, ovulation takes place about 10-14 days before the next period starts. (Since we don't know when the next period is going to start, this makes it tough to determine.)
Using a 31 day cycle (another problem since each person, each month may have a different length of cycle) for example:
Day one is the first day of menstruation. If Day 31 ahead is when she expects her period the next month (based on charting her period for a year and determining how long her cycle actually is) then ovulation will occur approximately on day 17-21 from Day 1.
That would be about two weeks after her period ends assuming she has a 5-7 day period. IF she has been experiencing only 26 day cycles, then it would be even a shorter time after her period ends.
The other problem that you didn't mention is that sperm can live 4-7 days inside of the body, so that if you had intercourse unprotected and left sperm inside of her 4 days before she ovulated, she could still get pregnant.
If you have more questions please ask. I usually explain what I did above my making a chart and since that isn't possible it is a little hard to know if you might understand it. Reviewed by: Scott Gross M. Ed.
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