P–067 Utility of evaluating semen samples from adolescents with Klinefelter Syndrome for cryopreservation: A multi-institution evaluation

Abstract

Abstract Study question Should physicians continue to evaluate semen analysis from adolescents with Klinefelter Syndrome for fertility preservation? Summary answer In the largest multi-institutional retrospective database to-date for this patient population, no sperm was found in ejaculate for cryopreservation amongst adolescent males with Klinefelter Syndrome. What is known already Klinefelter Syndrome is the most common genetic condition leading to male infertility and non-obstructive azoospermia. The condition causes decreased testicular growth, leading to lower production of testosterone and resulting deficiencies in secondary sexual characteristics. While testosterone therapy may be required for hypogonadism, there may be impact on future fertility potential. Current practice is to have KS adolescent patients provide semen analyses to identify potential sperm for cryopreservation. While the incidence is low, current epidemiological studies have been with limited sample size. Study design, size, duration This was a retrospective study of all adolescent Klinefelter Syndrome patients seen at the male infertility clinics of two large academic institutions between the years of 2015 to 2020. Adolescence was defined as the ages of 10 – 19 years old, as per the World Health Organization. Participants/materials, setting, methods A total of 116 patients were identified for the retrospective study database. Demographic information including weight, height, comorbidities, concurrent medications were collected. Hormone levels such as FSH, LH, testosterone, and estrogen were included for 77 patients. Additionally, semen analyses were available for 49 patients. Main results and the role of chance: Of the 49 patients with semen analyses, only 3 patients had rare sperm in ejaculate not sufficient for cryopreservation while the remaining had azoospermia. The average ejaculate volume of the provided semen samples was 0.9 cc. The average serum total testosterone level of adolescent Klinefelter Syndrome patients was 236 ng/dL. As expected, gonadotropin levels were found to be elevated (mean: 18.47 IU/L for FSH and 9.12 IU/L for LH). Limitations, reasons for caution The main limitation for this study was the sample size. Wider implications of the findings: The findings from the largest retrospective study of this patient population imply a need to revisit counseling regarding the need for semen analyses in adolescent Klinefelter Syndrome patients. Trial registration number Not applicable