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The production of the videos was supported by a Wellcome Trust public engagement grant.
For further information about IVF treatment add-ons and the traffic light system, see guidance provided by the Human Fertilisation and Embryology Authority (HFEA): https://www.hfea.gov.uk/treatments/treatment-add-ons/
The HFEA also publishes data on average birth rates from IVF in the UK. You can find their 2019 report here (published in May 2021): https://www.hfea.gov.uk/about-us/publications/research-and-data/fertility-treatment-2019-trends-and-figures/
For further details about the Remaking the Human Body project and the research behind the videos, see the About the project and Publications pages.