The United Nations Population Fund (UNFPA) has warned that about 70 million girls face Female Genital Mutilation (FGM) between 2015 and 2030 across the world.
The new figures, according to a statement by the UNFPA on Tuesday in Abuja, project that the current estimates of 3.9 million girls mutilated each year will rise to 4.6 million by 2030.
This calls for urgent and massive scale-up efforts to prevent that from happening, the organisation said.
"The increase is due to projected population growth in communities that practice mutilation.
"More than 200 million women live with FGM today.
"The new figures show just how far we have to go to eliminate female genital mutilation," said UNFPA Executive Director, Natalia Kanem.
"The good news is we know what works. Greater political will, community engagement, and targeted investments are changing social norms, practices and lives.
"We need to quickly step up these efforts to make good on our collective pledge to end female genital mutilation by 2030."
The new numbers come from a more robust method to generate age-specific risk data for mutilations.
"The data were then combined with United Nations world population estimates to project overall risk.
"The new figures now also include data from Indonesia, where the revised method captured the approximately 1 million girls facing mutilation in their first year of life.
"Although the risk of a girl being mutilated is about one-third lower than it was three decades ago, more of them will face mutilation as girls' populations increase," said Kanem.
The world marks the International Day of Zero Tolerance for FGM every February 6.
UNFPA, along with UNICEF, leads the largest global programme to speed-up the elimination of FGM.
"UNFPA remains committed to supporting communities in fighting to end this harmful practice, which has no place in the 21st century," the executive director said.