Pregnant? I had sex with my boyfriend on december 30, and my period had ended on december 23. The condom came off inside of me, but it was over 3/4 of the way out and all of the semen seemed to be inside of the condom and not inside of me. My period was d

If. If the average human sperm cell is about 55 microns long (very, very, very tiny) you would be unlikely to see it if it slipped out of the tip of the condom. Remember that the sperm can whip it's tail to move. I would not be comforted by the fact that all of the semen appeared to be contained in the condom. Make sure to use condoms before their expiration date and to place it on the penis correctly.