One in every 100 women undergoing a cycle of IVF treatment suffer an "adverse incident", according to fresh data.
Approximately 500 to 600 mistakes are made in every 60,000 cycles of IVF, the Human Fertilisation and Embryology Authority (HFEA) found.
HFRA, which licenses the IVF industry found there had been 714 grade B incidents, 815 grade C errors and three grade A mistakes - the most serious error - during this time frame.
One of the most serious mistakes reported was a family receiving the wrong sperm.
The couple were supposed to be given donor sperm from a specific donor - so their child would have the same genes as their sibling - but they were given the sperm of a different donor.
More top news
Coronation Street has found another actress to play Bethany Platt, after a previous one was dropped for lying about her age.
Andre Luzganov, who shot dramatic video of the attack the weekend, told ITV News his family has left and will not be returning to Mariupol.
A call operator at NHS 111, which was designed to relieve pressure on emergency services, tells ITV News the system is struggling to cope.