A sperm donor in the Netherlands has been caught donating sperm to 11 different fertility clinics and has fathered at least 102 children, RTL news said on Saturday.

In the Netherlands, sperm donors many not father more than 25 children and are supposed only to donate at one clinic. In a second case highlighted by RTL, a man has fathered two children at two different clinics.

The Dutch gynecologists association NVOG has called on clinics to stop using the men’s sperm immediately. There indications the men had very recently offered their services to various clinics and that some women are currently being impregnated using their sperm, the organisation said.

The men have also been donated sperm to would-be mothers outside the regular health service, RTL said.

The NVOG found about the multiple donors after being tipped up by a group of single mothers but does not give any more details about how it tracked down their donors. The women do, however, say, that the two men may have fathered ‘several dozen’ children outside the regular fertility clinic circuit.

Records

Clinics are not currently able to see each other’s records about sperm and egg donors. However, if this was possible, similar situations could be made impossible in the future, the NVOG said.

This June, more than 20 children conceived with sperm from a fertility clinic run by the late doctor Jan Karbaat have won the right to have his DNA examined.

The judge ruled that samples from 27 items confiscated after Karbaat died in April can be used to make a DNA profile. He is suspected to have fathered dozens of children via his own clinic.