There were three "grade A" or major mistakes made by fertility clinics over a two year period, the industry regulator said.
HFEA discovered over a two year period starting in 2010 fertility specialists:
- Gave one family the wrong sperm.
- Another incident involved dishes with the embryos of 11 patients becoming contaminated with "cellular debris that may have contained sperm".
- The final grade A error occurred when a member of staff destroyed frozen sperm from storage while it was still within its consent period.
More top news
Plan would leave steelworkers worse off in retirement - but not as worse off as those in other pension schemes.
Donald Trump has labelled Hillary Clinton "crooked" and says he cannot wait to face her in November's US presidential election.
Thursday brings better temperatures