Islam Mohmand and his two wives have so many children that he sometimes gets confused and needs help to remember all of their names.
They have 20 kids in all but would be happy to bring even more into their small family house.
But population experts in Pakistan, where the Mohmands are from, say families like theirs are fueling a population explosion that is fast becoming the country's most dangerous crisis.
Pakistan's population has grown from around 33 million in 1947 to more than 180 million people in 2012, making it the sixth most populous country in the world. It is also one of the world's poorest, with 60% of Pakistanis living on just $2 per day, according to the World Bank. The majority of the population -- 70%, according to the United Nations -- is largely illiterate and resides in rural areas lacking the most basic services.
With only one in five Pakistani women using modern birth control, the United Nations estimates Pakistan will become the world's third most populous country after China and India by 2050.
"I consider the population problem the biggest problem of this country," said Akbar Laghari of Pakistan's Department of Population Welfare.
"The future is bleak because of this."
He admitted the government has to share the blame as not enough is done to offer effective family planning services and teach people about birth control.
I think it's an ignored problem. We're brushing it away and I'm afraid we're losing time.
Zeba Sathar, Population Council
"We don't have that much mobility, we don't have the resources," he said.
"Because of the political upheavals in the country and frequent changes in government ... they [the government] are not giving it top priority."
