3,000 Dutch children likely to have dozens of half-siblings: Why it has created furore in the Netherlands

The NVOG, the national gynaecology and obstetrics organisation in the Netherlands, has found fertility clinics have not adhered to sperm donation rules for years. It said there are more than 80 ‘mass donors’ in the country that have fathered 25 children or more. Here’s why it is controversial

Explainers