Abstract Study question Is it possible to determine which are the most prevalent genetic diseases in our argentinian gamete donor population to develop a regional genetic panel and carry out correct pre-reproductive counseling? Summary answer We found the most frequent recessive genetic diseases in the gamete donor population, and determined the frequency of positives and negatives for all analyzed mutations. What is known already The access of the population with fertility problems to the gamete donation program is every day more frequent. The analysis of recessive genetic mutations of both recipients and gamete donors is essential to ensure the absence of some diseases in the offspring. There are different ways to study the carrier of monogenic diseases, one of them is the CGT® (CARRIER GENETIC TEST), which could be performed on individuals with no previous personal or family history of disease in order to have knowledge of the asymptomatic carrier status and to reduces the incidence of genetic abnormalities. Study design, size, duration Retrospective descriptive study. 586 blood samples obtained in Nascentis (Cordoba) from December 2016 to November 2019 were analyzed. Of these, 159 were from donors who belonged to the gamete donation program. Participants/materials, setting, methods CGT® results of 159 donors of both sexes were analyzed. A blood sample was drawn from each patient and the kit was sent to Igenomix® for the corresponding CGT® analysis. A complete list of mutations was obtained, the most frequent were identified and the frequency of each one was calculated. We also created the ranking of the fifteen most frequent mutations in the population of oocyte and sperm donors. Main results and the role of chance The 159 CGT® analysis allowed us to compile a list of a total of 63 diseases present in the sample. 78.3% of the donors presented one or more mutations. 69.4% of women and 78.5% of men were positive for at least one mutation. Among men, the most frequent mutation was phenylketonuria (18.1%). Among women, the most frequent were Usher syndrome (8%), Oculocutaneous albinism type 2, Glycine encephalopathy and cystic fibrosis (5%). Other frequent ones were Wilson's disease, central core congenital myopathy, and retinitis pigmentosa. Limitations, reasons for caution It is possible that an increase in the number of CGT® analyzed slightly modifies some of the positions in the ranking of diseases, so it is suggested to carry out studies with a larger sample size in order to obtain more comprehensive conclusions. Wider implications of the findings The analysis of recessive genetic mutations of the gamete donors represents a fundamental tool to avoid the appearance of diseases in the offspring. Each fertility center should know the frequency of occurrence of the most common and/or serious diseases in order to obtain safer results in each of their treatments. Trial registration number not applicable
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