This is the first case in the world and almost unreal.
Doctors in Russia have been baffled after treating a baby girl who started showing signs of puberty at just three months old.
Milana, now seven-months-old, has regular periods, her breasts have started forming and she has developed pubic hair.
A source at the Russian Children's Clinical Hospital: "It is the first case in our experience of a baby going into puberty."
"So far, the world's earliest registered case was for a five years old girl."
The child is from the south of Russia, where local doctors said the baby was entirely normal at birth.
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