Background/aims: Fetal haemoglobin (HbF) has an oxyhaemoglobin dissociation curve that may affect systemic oxygenation and the development of retinopathy of prematurity (ROP). The study aim is to characterise the effects of HbF levels on systemic oxygenation and ROP development.
Methods: Prospective study conducted from 1 September 2017 through 31 December 2018 at the Johns Hopkins NICU.