Have unprotected sexual intercourse with a fertile male !
Yes. That is the most probable time to become pregnant.
Have intercourse during your peak fertile period.
Yes. Even if you're both fertile, it doesn't always happen.
Yes - you are still very fertile a day after ovulation
If a girl has her period every month at that age, she can become pregnant if there is unprotected sexual intercourse with a fertile man/boy.
VERY. Its happened to me too many times.
if it was during the fertile time any where from 10 to 16 days after monthly stopped
You would not menstruate at all if you were pregnant, and in theory you would not have been fertile at the point you had sex, so you'd not fall pregnant. However unless you use fertility awareness method you can't know when you are fertile or not, so pregnancy is a possibility.
It is entirely possible that pregnancy could occur if she is fertile. This is no different whether the woman is a virgin or not.
It is possible to get pregnant at any time. 9 days before your period, you are very fertile. Make sure you use protection unless you are trying to get pregnant
from the time a girl/woman starts her first menstrual she has the ability to become pregnant. but, you are only fertile between 12-24hours. then the ovum will being to break down. your only fertile those hours every25-35 days. that's why people arent pregnant every time they have intercourse.