Professor Quigley's areas of research interest include breastfeeding, fathers and smoking in pregnancy. She has published extensively on the health outcomes associated with infant feeding and was a co-investigator of a UNICEF-funded project which estimated the costs associated with not breastfeeding in the UK. She has recently led an MRC-funded study of health outcomes in infants conceived following infertility treatment and a Bupa Foundation-funded study of health outcomes following preterm birth, with a particular focus on late preterm and early term birth. Together with the Multiple Births Foundation, she has co-led a project to produce guidelines on infant feeding in multiple births, which was funded by the Big Lottery Fund.
Professor Quigley has considerable experience of working with the media, including with UK and international radio stations and with a number of newspapers.