The INTERGROWTH-21st Project presented a complex set of ethical challenges given the involvement of health institutions in geographically and culturally diverse areas of the world, with differing attitudes to pregnancy. This paper addresses how the research team dealt with some of those issues.

BJOG: Burton F, for the International Fetal and Newborn Growth Consortium for the 21st Century (INTERGROWTH-21st). Ethical issues arising from the INTERGROWTH-21st Fetal Growth Longitudinal Study. BJOG 2013; 120 (S2): 77-80.