A teenage mother, as mapped here, is a girl / woman aged between 15 and 19 years old who has at least one child. A map of teenage fathers might look similar to this.
A third of all the teenage mothers in the world live in India. There are three times more teenage mothers living in Southern Asia than live in any other region. The fewest recorded teenage mothers live in Japan.
Being a young parent is normal in some parts of the world, whilst in other parts teenage parenthood is a rarity. Where it is a rarity mothers tend to be considerably older - but internationally comparable data on older mothers does not yet exist.