My girl friend miss her periods .and we have unprtected sex before two three days she is still virgin sperms dint inject inside .what is a fault?

Need pregnancy test: I guess some clarification is in order. If you are a male having penile vaginal intercourse, there is still a significant chance of pregnancy, even if you withdraw before orgasm. Even if you have oral or anal sex but sperm is sprayed by the vaginal canal occasionally pregnancy can result. Of course periods can also be irregular. If your not pregnant i would really encourage use of protection.

Pull out doesn't wrk: Your definition of a virgin is confusing.If you are having sex, neither of you is a virgin.That said, pulling out doesn't prevent male material from gaining access to the female genitals & potentially starting a pregnancy.Sperm are found in active numbers in all male secretions from the point of early stimulation. The main "load" delivers a lot, but it only takes one.