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133 Gynaecology and Colposcopy NMH Annual Rep t | 2020 policy. Of this group, a subset of good prognosis patients had an elective single embryo transfer (eSET), meaning they had a good quality embryo to transfer and at least one other to freeze. This group comprised 36.8% of all embryo transfers and, across all age groups, had a clinical pregnancy rate of 52.5% on the fresh cycle. Of those eSET patients who did not conceive on their fresh cycle, 36.7 % conceived on their first frozen embryo transfer (FET), bringing the cumulative pregnancy rate in this group to 72.3 % (following one fresh transfer and a FET if the fresh was unsuccessful). Many of these patients have additional embryos still in storage. Multiple pregnancy: The multiple pregnancy rate following a fresh embryo transfer was 7%, a rate which is very low by international standards. All of these multiple pregnancies were twins and occurred following double embryo transfer (25% multiples vs 0% in SET group). The multiple pregnancy rate for frozen embryo transfers was 3.9%, reflecting excellent decision making regarding the number of embryos electively transferred. Livebirth rates: (LBR) are the best marker of ART success and are reported for 2019 as, at the time of writing, not all 2020 pregnancies are complete. The livebirth rates per embryo transfer for fresh IVF and ICSI cycles performed in 2019 (delivering in 2019/2020) are excellent by international norms (Table 3, Chart 2). Approximately one third of all couples completing IVF/ ICSI cycles had a livebirth. (Tables 3-5) Frozen embryo transfer (FET) cycles: In 2020, 236 FET cycles were completed with a clinical pregnancy rate of 38% per transfer. The livebirth rate per embryo transfer for frozen embryo transfer (FET) cycles performed across all age groups in 2019 was 27.5%. Intrauterine Insemination (IUI): The clinical pregnancy rate with intrauterine insemination in 2020 was 9.9%, a small decrease from the previous year (10.6%). However, the number of cycles is small (100) so this drop is not likely to be statistically significant. The livebirth rate per completed cycle IUI was 9.9% I 2019. Donor Sperm treatments: Merrion Fertility Clinic commenced a donor sperm service in 2018. Sperm is sourced from 2 approved banks in Denmark. This is an essential treatment for single women, lesbian couples and heterosexual couples with severe male factor