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					Originally Posted by ErinKathleenNJ  4 year olds?  Do you mean 14 year olds?  4 year olds don't get their period, so they cannot have a baby.  4 year old bodies haven't produced any of the hormones to start puberty...not till about 7 y/o.  then puberty comes a few years later.  4 year olds do, unfortunately, are victims of sexual abuse.  they can get STIs, but cannot produce a baby.  I would like to see a study where 4 year olds have ovulated and produced an embryo. | 
	
 AKA Monet is actually correct in saying 4. I believe the earliest recorded pregnancy was with a girl around that age, obviously with some genetic abnormality which induced early sexual development.
If I'm not mistaken, the youngest girl that actually gave birth to a baby without miscarrying was 8. Again, due to some kind of early development issue.
I'll post the links to the stories when I have more time, but I'm sure a quick Google search would provide this information for you.