Every day, 20,000 girls under the age of 18 give birth in developing countries. That's according to a new report from the United Nations' population fund.
It found that impoverished, poorly educated and rural girls are more likely to become pregnant than wealthier, more educated girls.
And for thousands of girls each year, teenage pregnancy results in death.
Al Jazeera's Nidhi Dutt reports from New Delhi on how attitudes to teenage pregnancy are changing.