The care of pregnant women and neonates at the limits of viability is one of the greatest challenges in contemporary medicine, from a clinical and ethical point of view. Advances in the obstetric care of women with threatened preterm labour and in neonatal intensive care have led to an increase in the survival of premature infants in last decades. The gestational age (GA) at which a neonate is considered viable enough to justify active perinatal behaviour has been lowered. 1 The limits of viability are currently defined as 22-23 weeks in most Western countries. [2][3][4][5] Factors that influence survival other than GA have been defined. Some of them are modifiable and are closely related to the clinical approach of the obstetric and neonatal teams to deliveries in these GA. These include the use of antenatal steroids, 6,7 the use of magnesium sulphate for neuroprotection, 8 the in utero transfer to