Transgender care, especially regarding the care of children and adolescents, is a relatively new field, in which developments are rapid, in which there is still relatively little empirical data... Show moreTransgender care, especially regarding the care of children and adolescents, is a relatively new field, in which developments are rapid, in which there is still relatively little empirical data available on long-term outcomes of providing or refraining from early medical treatment, and which is a subject of polarized debate. This thesis describes the themes that lead to controversies surrounding the use of early medical treatment for transgender children and adolescents. For each theme, it describes how the considerations, ideas and newly obtained scientific data, when applicable, have changed and developed over the recent years. It shows that care for transgender children and adolescents inherently involves ethical dilemmas, even if more clinical research data will be provided to underpin the evidence-base. Evidence alone will likely not be able to provide answers to all raised uncertainties concerning adolescent gender-affirming medical care. Ethical dilemmas will therefore probably remain part of this sensitive field of care. Besides illumination of some of these ethical dilemmas, this thesis gives suggestions for future studies and proposes ways of dealing with them in clinical practice. Show less