Everything You Need To Know

Statistics from the Human Fertilisation and Embryology Authority (HFEA), the fertility industry regulator that is required to record all incidences of OHSS, suggest a third of women undergoing IVF will develop mild OHSS. However these statistics may not be accurate because, as the HFEA notes, clinics are required to report all cases of ‘severe’ or ‘critical’ OHSS but ‘mild’ or ‘moderate’ cases do not currently need to be reported. They also fear that OHSS may be under-diagnosed by fertility clinics, meaning that some cases never make it into the official data. Since 2001, two women are reported to have died as a result of OHSS, according to the Office for National Statistics (ONS).