Women using unregulated websites to find a sperm donor have been harassed and sent photos of miscarriages, the BBC has found.
Fertility expert Dr Larisa Corda said the growing trend of online sperm donation was “really alarming”.
She said: “I think women are putting themselves in an incredibly vulnerable position medically speaking and secondly the potential for abuse.”
She said she believed the cost was a real barrier to a lot of women and it meant they were putting themselves in vulnerable situations, such as using unregulated online donors.
“In the ideal world, I’d love to see them shut down because I think women’s safety and welfare has to be paramount here,” she said.