Christophe Z Guilmoto is a Senior Fellow in demography at the FrenchInstitut de recherche pour le développement(IRD) affiliated to the CEPED research unit in Paris. In France, he taught at Université Paris Descartes and EHESS. He joined in 2021 theCentre de Sciences Humaines, New Delhi, to work on the demography of inequalities.

He was trained initially in Mathematics and Sociology. After researching at the Madras Institute of Development Studies in Chennai and the Institute of Economic Growth in Delhi, he received a Ph.D. in Demography in 1989 at Paris I University for a dissertation on India's historical demography. He then worked in Senegal in the early 1990s and published extensively on international migration. In 1997-2002, he was based at the French Institute of Pondicherry and worked on fertility decline in India. Over the last decade, his research mainly focused on prenatal sex selection from Albania to China. He has organized several conferences, panels, and training sessions on sex imbalances at birth in Europe and Asia and wrote more than ten monographs on gender-biased sex selection in countries of Asia and Eastern Europe, including the global report on sex imbalances at birth published by the UNFPA.

His last book wasDemographic Transformation in China, India, and Indonesia(coedited with Gavin Jones, Springer 2016). His recent work appeared notably inPopulation Studies,Population and Development Review,Population, The Conversation,PLoS-One,JAMA,Lancet Global Health, The History of the Family,andBMJ Global Health.