Captivating Documentary Reveals the World’s Largest Family.

He starts in Lincolnshire, where Steve and Debbie Shepherd have 12 children with another on the way.

Then he travels to Canada to meet the Lonces, a Romanian family with 18 children.

On his next visit – to the United Arab Emirates – Mark comes across Daad Mohammed, a Muslim who, under the polygamous system of his faith, is entitled to four wives at a time.

Now in his 60s, he’s had 17 wives and 84 children.

In Spain, Mark meets Jose Maria Postigo and his wife, Rosa (pictured), the parents of 17, or is it 15 children?

Jose Maria himself seems confused, until Dolan learns that two of his children have died from a congenital heart defect.

Of the remaining 15, six also suffer from this problem, forcing Dolan to question the ethics of continuing to have children in the face of this illness.