Jessica describes meeting the sperm donor who'd fathered her daughter.
A team of experts appear to have solved a mystery that has confounded academics - and the public - for decades.
Natasha always knew that she was conceived using a sperm donor, but she also knew that she would never be able to find out his identity.
A DNA test brought the Wheeler siblings back together after almost 50 years apart.
Nigerian start-up 54gene is building Africa's first bio bank for DNA.