I am age 20. My girlfriend and I got intimate, and I ejaculated near her vagina. Maybe my sperm was on her vulva, outside the vagina, on the skin. She has finished with her periods nine days back. Can she get pregnant? What are the chances?
For a pregnancy to occur, one of your sperm must meet up with her egg on the day that it is released. Your semen contains about a half-billion sperm in each ejaculation. Those sperm swim. While the ideal delivery point is the at the far end of the vagina, sperm can swim up the vagina and some can survive. Once inside, sperm can survive up to six days. Each day, the number of surviving sperm decreases, but it only takes one live sperm to reach the egg on the appropriate day to cause fertilization.
I don't know if you had your penis inside her before you ejaculated, but that would increase the odds because your pre-ejaculate fluid (the clear liquid that drips when you are aroused) can contain sperm.
Since you were sexually aroused, I would assume that she was as well. That means her vulva would not have been closed. Even ejaculating outside of her, there is a moist path for the sperm to swim up the vagina.
A woman releases an egg 14 days before the start of her next period. The length of time between periods can be variable, so measuring from her last period isn't accurate. But let's assume that she has a period once every 28 days, which the typical average though periods can go from 14 days to 36 days apart. Assuming her period lasted about five days, then the day you ejaculated on her was 14 days into her next period and 14 days before her next blood flow.
Therefore, there is a small chance that some of your sperm could reach her egg and cause a child to be conceived. You won't know if that happened or not until the time her next period is due. If she has her period, then she is not pregnant. If she is two weeks past when she should have had a period, she can take a pregnancy test to find out if there is a child in her.
The fact is that you and she sinned. You were involved in lust and lewd behavior, and possibly fornication as well. "Let us walk properly, as in the day, not in revelry and drunkenness, not in lewdness and lust, not in strife and envy. But put on the Lord Jesus Christ, and make no provision for the flesh, to fulfill its lusts" (Romans 13:13-14). The simple fact is that you and she are not married. You had no business behaving in sexual ways with each other. Unfortunately, sins can have consequences. When people act sexually, regardless of their intentions, a child can result. But something that is certain is that your sins have placed you in jeopardy of not reaching heaven, unless you change. "Marriage is honorable among all, and the bed undefiled; but fornicators and adulterers God will judge" (Hebrews 13:4).