I am a cultural anthropologist working at the intersection of science and technology studies, theories of gender and race, social studies of medicine, and bioethics. My research and teaching examine—and challenge—scientific and medical beliefs about gender, sexuality, and the body across a range of topics. I am Professor of Sexuality, Women’s, and Gender Studies at Amherst College and a Senior Research Fellow with the Global Health Justice Partnership at Yale University. I previously held appointments at Stanford University and as the Carol Zicklin Chair in the Honors Academy at Brooklyn College, CUNY. I have also served as a Visiting Professor at Emory University.

My latest book, Testosterone: An Unauthorized Biography, written with Rebecca Jordan-Young and published by Harvard University Press, unsettles a great deal of long-standing knowledge and beliefs about this hormone. Testosterone was awarded the Gold Medal in Science from the Independent Publisher Book Awards. This work was supported by the National Science Foundation and the Brocher Foundation, as well as a Guggenheim Fellowship and an American Council of Learned Societies Research Fellowship. A recent essay, "The Masculine Mystique of T,"  was published in the New York Review of Books.

My work on testosterone stems from my earlier research, including my research on “sex testing” and sport regulations that ban women athletes with naturally high testosterone. This research has appeared in Science, The American Journal of Bioethics, BMJ, and Feminist Formations. I contributed to Dutee Chand’s successful appeal of the IAAF’s testosterone regulation at the Court of Arbitration for Sport (CAS) and served as an expert witness in the hearing. I also consulted with Caster Semenya’s team prior to her CAS hearing. I have also contributed the Report of UN High Commissioner for Human Rights, Intersection of race and gender discrimination in sport (June 2020) and the Human Rights Watch Report, “They’re Chasing Us Away from Sport”: Human Rights Violations in Sex Testing of Elite Women Athletes (December 2020).

I began my career looking at controversies over treatment for people with intersex traits, which resulted in the book, Fixing Sex: Intersex, Medical Authority, and Lived Experience (Duke 2008). Fixing Sex was a finalist for Lambda Literary Award in 2009 and a nominee for the Margaret Mead Award in 2010.

My writing has appeared in the New York Times, The Guardian, Wired, and the New York Review of Books, among other outlets.

My research has been covered in the New York Times, Time, BuzzFeed, The Week, CNN, ESPN, The Daily Beast, The Los Angeles Times, Boston Globe, Jezebel, Slate, The Advocate, La Liberation, The Chronicle of Higher Education, San Jose Mercury News, and the Toronto Star. I’ve also appeared on The World, BBC, CBS News, NBC News, KCBS, CTV News, Q Radio, Al Jazeera, and the Australian Broadcasting Corporation, among others.

I hold a doctorate in Cultural Anthropology and a Master’s in Public Health, both from Columbia University.