She has published, among others, on:
gender bias in the practice of UN human rights bodies and the European Court of Human Rights
States' obligations to address domestic violence
pregnancy and childbirth rights
gender mainstreaming in international law
epistemic injustice in legal proceedings
Van Leeuwen is a lecturer in international public law and human rights at Utrecht University, where, as a researcher, she is a member of the Human Rights Study and Information Centre (SIM) and the Utrecht Centre for European Research into Family Law (UCERF). She is also the Dutch expert on gender equality law for the European Commission’s European Equality Law Network.