Yes. To become pregnant, the female's ovum must be fertilised by a single sperm cell. Semen carries millions of sperm cells into the womb to meet the ovum cell.
No just a litle way in is enough. A man with a very short penis can have children quite easily. The theoretical chance of getting pregnant begins at smearing semen around/on the opening of the vagina, and increases when he enters. But after that there's really no difference in chance whether he's 1/3, 1/2 or all the way in. Also note that semen will leak a little before the big discharge, and that little is still plenty enough to knock you up.
it grows
No
not only hers!both have this responsibility,if you don;t want to be a big big big family.
They may not allow it as the baby will play a big part.
Yes. The trouble you can get in is when her dad and brothers find out. You will be in big trouble.
Do you mean after the withdrawal of your partner?,,,, there is a big chance that you may get pregnant once if you are fertile. A pre-ejaculation phase(before withdrawal if your partner doesn't use condom) contains semen in which a woman may get pregnant. There is also also a big chance that after withdrawing if the penis will be put back into your vagina and he wasn't able to urinate( urine is an acid liquid that may kill sperm at the urethral meatus) you may also get pregnant.
a normal man ejaculate semen about one tea spoon or big spoon.
I thought the point of saddlebacking was not to get pregnant. See http://saddlebacking.com/
Prenatal tablets are vitamins etc so a very big risk since you are unprotected.
you may actually be a house and be too dumb to notice. check and see if your porch is showing.
Please refrain from asking questions on this site, please see a doctor