Reproduction

This study describes the ProspectiveMaleAYA cohort, a multicentre, prospective, longitudinal European study designed to investigate the long-term impact of cancer and cancer treatments on reproductive and endocrine health in adolescent and young adult (AYA) male cancer patients. Addressing major gaps in standardized prospective data, particularly for long-term fertility, hypogonadism, and the effects of newer systemic therapies, the study will harmonize data collection across centres and follow patients from diagnosis through post-treatment survivorship. Comprehensive clinical, oncologic, reproductive, hormonal, biological, and patient-reported outcomes will be collected at predefined intervals to evaluate testicular dysfunction, fertility impairment, oligo/azoospermia, sexual health, and quality of life. Sub-cohorts will enable focused analyses of genetic and epigenetic sperm changes, whole-genome sequencing to identify susceptibility to reproductive and organ toxicity, accelerated aging markers following specific treatments, access to and satisfaction with fertility counselling, and sexual health dysfunctions. The overarching aim is to identify risk factors and predictive markers, develop individualized risk stratification and prediction models, and support precision, patient-centred survivorship care for male AYA cancer survivors.

This is an observational longitudinal study to advance the understanding of menstrual cycle and gynecologic health conditions including PCOS, infertility and breast cancer.The study will be hosted within the Research app(available on App Store), which allows a user to find, enroll, and participate in Apple-supported health-related research studies.