the percentage is 50-50
Barrier
They have it so when in a sexual intercourse (sex) they can sperm the girls egg!
The barrier method
if you are married you and your husband/wife give egg and sperm to a clinic, it gets implanted in another women, and she has your baby.
What is leaking from the vagina is not the 'cum' all together. the semen, or the liquid that protects the sperm from the women's natural defences, have no reason to remain in the vagina once the sperm have collected into a place called 'the sperm pool' which holds the sperm until the cervix or the small opening that leads to the uterus opens and allowd the sperm to move in and find the egg. Thus the semen is leaked back out of the vagina, since it is not needed in the body anymore.
it stops the sperm from reaching the egg.
Have children.
No. Just NO. Foolishness
The barrier method
A barrier contraceptive
It's not possible, because after one sperm cell reaches an egg, the egg cell slightly changes look to keep other sperm cells from reaching the same egg.
no it does not it says in the information that it keeps the sperm from reaching the egg (it kills the sperm not the egg)
A lot of sperm are needed to increase the chances of finding the egg. Both egg and sperm are tiny and, compared to their size, the sperm must cover a vast distance.
The barrier method
The semen is released into the vagina, while the egg is reaching the lining of the uterus, the sperm penetrates the egg.
The barrier method
Only one sperm fertilises an egg in normal cases, abnormally there are chances of fertilization by 2 or more sperm cells but such a zygote usually does not survive.