Recurrent implantation failure (RIF) is defined as the absence of a positive pregnancy test after three consecutive transfers of good quality embryos. There remains significant variation in clinical practice in the management of RIF. This British Fertility Society (BFS) Policy and Practice guideline analyses the evidence for investigations and therapies that are employed in RIF and provides recommendations for clinical practice and for further research. Evidence for investigations of sperm and egg quality, uterine and adnexal factors, immunological factors and thrombophilia, endocrine conditions and genetic factors and for associated therapies have been evaluated. This guideline has been devised to assist reproductive medicine specialists and patients in making shared decisions concerning management of RIF. Finally, suggestions for research towards improving understanding and management of RIF have also been provided.

This article considers two key policy documents concerning donor-assisted conception in the UK, The British Fertility Society\'s Recommendations for Good Practice on the Screening of Egg and Embryo Donors and the Human Fertilisation and Embryology Authority\'s Guidance for Egg Sharing Arrangements. It discusses both the process and the evidence used in formulating those sections of the documents which relate to donor anonymity. The paper concludes that psycho-social policy developments in assisted conception, such as those relating to donor anonymity, should be subjected to comparable levels of rigour and scrutiny to those that are applied in the formulation of medical and scientific policies.