If my girlfriends period ends tomorrow whens the best time to conceive? her fertile/ovulation period is in 2 weeks time.

Optimum Fertility: There is usually a window of varying length. Sperm can survive up to 5-7 days inside the body in some cases. Generally, ovulation will take place about midcycle if you have regular 28 day cycles. Take the average cycle length and substract 14 days to find the best time. You can also simply try using urine LH gets to determine optimal fertility. This, however, is not birth control.

Fertile time: The most fertile day of the cycle is the day of ovulation. She can start using an ovulation detection kit on day 11 of her cycle. This test detects the surge of LH that precedes ovulation. Once the test is positive, ovulation usually occurs the next day, so the best time to have intercourse would be the day following the surge and everyday after for the next 3 days. Good luck!

In 2 weeks: her time of ovulation is the time she is able to conceive. Having intercourse within a day or two of ovulation is the best chance for conception. Good luck!