The number of in vitro fertilisation errors reported by fertility clinics in the UK has more than doubled since an official report four years ago criticised the safeguards that were in place.

The Human Fertilisation and Embryology Authority (HFEA) said that better reporting procedures are responsible for the increase in errors rather than a fall in standards, The Independent reports.

The number of errors eported to the HFEA in 2007–2008 was 182, with incidents involving the wrong embryo being implanted into a woman or stimulating a woman’s ovaries to a level where her long-term health was risked.

The figures have more than doubled since the 79 incidents reported in the previous year, when the government had conducted an inquiry to improve safety procedures, The Independent reports.