Hypoestrogenism

The goal of this study is to learn about the role of estrogen and other hormones in bone development in adolescent and young adult women with cystic fibrosis (CF). The study has two main components, an observational study and a feasibility sub-study. The main questions it aims to answer are: * How do different forms of hormonal contraception (e.g. birth control pill or other progesterone only methods) impact bone health? * Is a study of transdermal estradiol (estrogen skin patches) feasible in this group? * How does transdermal estradiol impact bone health and quality of life? Participants in the observational study will have three study visits (baseline, 6 months, and 12 months). At all visits, participants will have blood drawn and will complete questionnaires. At the baseline and 12 month visits, participants will additionally have x-rays and DXAs (bone density assessment). Between visits, participants will complete brief questionnaires. Researchers will compare various measurements over time to assess the impact of different forms of hormonal contraception. Participants in the feasibility sub-study will apply transdermal estradiol patches once weekly for 12 months, fill out brief quality-of-life surveys in between study visits, and complete blood draws and questionnaires at four study visits (baseline, 3 months, 6 months, and 12 months). The participants will also have x-rays and DXAs performed at the baseline and 12 month visits. Researchers will examine changes in various measurements to determine the impact of transdermal estradiol.

The principal aim of this prospective observational study is to investigate the cognitive function of breast cancer patients that use AI, comparing it with age-matched healthy controls, utilizing cognitive assessments and functional magnetic resonance imaging (fMRI). Additionally, the project seeks to establish correlations between cognitive function and other estrogen deprivation symptoms, including vasomotor symptoms, and to evaluate a possible correlation with endothelial damage studied through Angio Optical Coherent Tomography (angio OCT). Patients will be recruited during follow up visits at the iatrogenic menopause outpatient clinic. After informed consent, the will be asked for detailed demographic data, medical, oncological and gynecological history. Hypoestrogenism symptoms will be collected through validated questionnaires. The cognitive assessment will be performed on the same day, by trained staff. The fMRI and angioOCT will be booked and performed depending on patient and clinic availability.