My girlfriend's period starts on april 24-27, 2013 and we had sex on may 1st 2013. is it possible fo

we're hoping that she is not pregnant.. are you 100% sure that she will get pregnant? her period last on 27th of april..

If you had sex then, there is a very very good chance. In about one week, a home pregnancy test could detect it. So have her take one then

Women ovulate after their period actually starts, so you would have had sex when she is ovulating

omg.. thanks for the time.. :))

but is there a chance that she will not get pregnant?

Here's a fertility calculator. You can input the relevent dates to see if you were in the danger zone (ovulation). Remember sperm can live in the female body for up to six days.
http://www.babymed.com/fertility-ovulation-calendar-calculator

tnx :)

i can't understand the calendar.. sorry but u can compute it for me? big thanks... her last period is on 27 of april but a little bit.