It seems there is some evidence that germ cells live for several days, but they have not discovered how long they have fertilizing power. It is known though that the period of ovulation is variable and may occur either early or late in the cycle. Records have been made of the temperature of many women and show that the temperature drops from 24 to 36 hours before the onset of menses and reaches a low level during the first day or two after the beginning of the period. The low level of temperature will continue during the entire period and up to the time of ovulation. There will be a sharp drop in temperature occurring just before ovulation and then a prompt rise until 24 to 48 hours before menstruation in the following period, when the temperature will drop again.
Conception is most likely in the three-day period following ovulation.
Pregnancy will occur when there is coitus during the period of temperature rise following the drop of ovulation and immediately after the temperature reaches its plateau and there will be a fertile period of 3 days. Inc. PageWise makes no representations about the content published on this site. PageWise hereby disclaims all warranties and conditions with regard to this information, and user agrees that all such use is at its own risk. If you are under 18, please do NOT opt-in to receive email offers on this page.