Right. I’m not trying to extrapolate it. My conclusion is based on the statistics in the page I provided a link for in that exact sentence. Here are some of the quotes from there:

‘girls under the age of 15 are five times more likely to die in pregnancy than women in their 20s’


‘girls under 18 are reportedly more likely to give birth to premature babies and have complications during labour’


‘if a mother is under 18, her baby’s chance of dying during the first year of life is 60% higher than a baby born to a mother older than 19’