Charlotte Greenhalgh is Senior Lecturer and Convenor of the History Program at the University of Waikato. Her project on the history of pregnancy in twentieth-century New Zealand has been supported by a Royal Society of New Zealand research grant. She is also working on collaborative projects on the international histories of social surveys, hormonal pregnancy tests, and perinatal medicine. Charlotte is the author of Aging in Twentieth-century Britain (University of California Press, 2018).