It Depends To Your Mate :D
yes, if the girl is fertile.
No that means that they are fertile.
Fertile means you can get pregnant or get someone pregnant. For a girl it's ovulation and menstruation and for a boy it means sperms are now live and kicking in his semen.
yes, you have to be fertile to become pregnant.
yes
yes
no, a boy cannot get a girl pregnant before puberty. for fertilisation to happen, bi=oth the eggs as well as the sperm have to be fertile and mature.
The fertile time is the most likely time to get pregnant.
On your fertile days.
no she isnt
It depends on if the 12 year old girl is fertile, And if the boy can ejaculate sources: I'm a teenager.
Women are most fertile about 14 days before the start of their period.