The youngest a girl can actually get pregnant is around age 11 which is usually when most girls begin ovulating and producing eggs that allow the girl to fertilize with the sperm and create the baby.
The girl must be ovulating and producing eggs to that the males sperm that gets into the girls vagina mates up with the egg and fertilizes which is what causes the girls or woman's pregnancy.
The male who has the intercourse with the girl must also be producing sperm that is fertile which is also around age 11 to 14.
So an 11 year old who has sex with an 11 year old girl could get the 11 year old girl pregnant which is not a good thing because an 11 year old boy and 11 year old girl is much too young to be responsible enough for taking care of a baby.
Still if a daughter of mine got pregnant at age 11 or my son at age 11 got a girl pregnant I still would help support the baby because I would not want it adopted off.
But you should always teach your kids about safe sex and when it's appropriate and teach them the big responsibility of taking care of a baby.
I love all my kids but they are a big responsibility now and they were an even bigger responsibility and lots more work when they were babies and they require money to take care of properly.
You need to buy formula, diapers, baby food, clothing, shoes etc.