What is the chance my girlfriend will get pregnant?

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So last night me and my girlfriend were having sex and I had a partial ejaculation in her, I would say 1/4th of a normal ejaculation. She told me she shouldn’t get pregnant and its a small chance. She doesn’t take birth control or anything. What is the possibility of her getting pregnant?

take plan B!!!!! i think it’s kinda late for that too, but still.. it’s better than doing nothing but waiting on luck!
umm what she said is not true then, because any amount of sperm that gets in her can get her pregnant, you being in her & pre/cum could get her pregnant! use protection, at least condoms! or get her on birth control.
do you have a cat?
She could be pregnant. When a man ejaculates completely inside a woman he releases about 30 million sperm and out of that 30 million only 50-100 sperm make it to the egg. The sperm has a long way to travel to reach the egg and the woman’s immune system fights most of the sperm. So, It’s alot harder to get pregnant than most people think. Wear a condom or talk to her about getting on birth control.
If you had sex 4 days prior and 4 days later of her ovulation day there is chance of her getting pregnant.
Let her take morning after pill within 72 hours of sex , Earlier the better.
A DROP of semen contains about 30,000 little spermies, and it only takes one.
Her risk of pregnancy will depend greatly upon where she is at in her menstrual cycle, but I assure you that if you can visibly see your semen, even if it’s a drop, it’s enough to fertilize a willing egg.
Be smart, and if you can’t be smart be safe.
There’s not much of a chance for her to get pregnant. I know this to be true after 2 years of my husband partially ejaculating before withdrawal.
ooh yeah she can get pregnant. it only takes one time.
Even the smallest amount of semen can get a female pregnant.
It depends on what time of the month it is for her.
For that reason and more, you should not be having unprotected sex unless you are ready to have children.