This method, called the withdrawal method, AKA pulling out, AKA coitus interruptus, is a totally ineffective method of pregnancy prevention. After a guy is aroused, and during sexual activity, pre-ejaculatory fluid, AKA precum, is secreted from the urethra. The purpose of this fluid is to neutralize the urethra so the sperm can survive. This fluid contains - you guessed it - SPERM! And as we all know, sperm can very well impregnate a woman. While the amount of sperm is considerably less than released during ejaculation, there is still a significant chance of pregnancy. Consider this: An average of 300 million sperm are released during ejaculation. If one tenth of that amount is released in the precum, that's still 30 million sperm, and it takes only ONE to get pregnant, so wrap it up boys! Another interesting fact: A girl who doesn't use protection during sex has a 90% chance of getting pregnant during the first year.
The highest number of sperm are in the first drops of ejaculate. Pre-ejaculate (also known as precum) can carry thousands of active sperm. The pull out method has a high failure rate because of this. Even a few drops of semen close to your vagina can result in pregnancy. The sperm will travel with your natural cervical mucous quickly swimming to reach an egg.
HMMMMMMMMMMMMM guess these refernces I have must be wrong or is it the other way around.......these references are right and the other poster is wrong?