Donor conception has undergone a radical shift since it was first practiced in the UK.  Attitudes have changed. Historically, parents were often advised that it was not necessary to tell their children about using a donor. Today, it is generally understood that sharing information about donor conception with children conceived using donor sperm, eggs, or embryos is a positive thing. Knowledge has developed. The research on this topic suggests that the psychological consequences of disclosure range from neutral to positive. There is some psychological evidence to suggest that telling children about their origins at an early age is related to parent-child relationship quality and wellbeing.  Official guidance has been updated. It is now a requirement under the HFEA Code of Practice that fertility clinics give prospective parents information about the importance of telling children, at an early age, about their donor conception.  Technology has moved on. The development and use of commercial DNA testing means that genetic connections are being identified in ways that weren’t historically possible.  This means that even in families where the facts of donor conception have been shared with children from an early age, unanticipated experiences, and conversations, may emerge. Findings from the Young Adults Study Approximately half of the young adults we interviewed had been told about their donor conception in childhood. The young adults explained that having an open dialogue about donor conception, where they could (but not necessarily would) ask questions as they grew older, felt important to them. The other half of the young adults we interviewed had learned about their conception in adulthood. Their perspectives and experiences varied. Some young adults explained that their parents had asked them not to share the information with other people, and some found this emotionally and practically difficult. Other young adults explained that being told later in life had temporarily affected their relationships with their parents, although this was not the case for all who had been told in adulthood. Regardless of the age that they learned about their donor conception, the vast majority of the young adults we spoke to felt it was important that parents share information about donor conception with their children.  All the young adults we spoke to wanted to have access to medical information. Beyond that, their wish for information about or contact with the donor and others conceived through the same donor varied. It did not depend on the age they were told or learned about their conception. Where to go for info & support Support with talking to your children of any age – whether for the first time, or about the different topics that come up over time in relation to their donor conception – is available through the Donor Conception Network: https://www.dcnetwork.org ​ Further resources and information are available from: Donor Conceived UK: https://donorconceiveduk.org.uk Human Fertilisation and Embryology Authority: https://www.hfea.gov.uk