hi.. i had done sex with my gf on 24 feb and her period was on 12 feb...i think i hadn't ejaculate the sperms..i taken out my pennis before ejaculation...so wat is the chances....if she got pregnent,then she missed period i.e.right or wrong...

Hi veermehra123,
Thank you for your question and for joining EmpowHER. Anytime you have sexual intercourse and don't use a condom there is a risk of pregnancy. The withdrawal method of birth control is only about 70% effective at preventing pregnancy. There also is a thing called pre-ejaculate fluid that doesn't contain sperm, but it could catch residual sperm left behind after a previous ejaculation, so it's not completely safe to engage in intercourse without protection.
If she misses her period, she can take a home pregnancy test, or ask for a pregnancy test from her doctor.
For more information, please review this article: Answers for Women: Am I Pregnant After Unprotected Sex?, and Am I Pregnant? Myths and Facts About Sex
Good luck and let us know how you're doing.