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AIM: We compared milk volumes, skin-to-skin contact and breastfeeding by the mothers of very preterm twins and singleton infants born at 28-32 weeks of gestation.

METHODS: This Norwegian longitudinal prospective comparative study was carried out in two neonatal intensive care units: one with single family rooms and one open bay unit. It comprised 49 singleton infants, 28 twins and their mothers. The mothers' milk volume and direct breastfeeding were recorded from birth until four months' of corrected age. They also answered the Breastfeeding Self-Efficacy Scale and skin-to-skin contact was recorded.

RESULTS: The mothers of preterm twins produced doubled the volume of expressed milk at day 14, compared to the mothers of singletons (mean 816±430 ml versus 482±372 ml, p<0.05) and this difference was still sustained at 34+0 weeks/days (p<0.02). Mothers of twins had their first breastfeeding attempt later than mothers of singletons (median of 133 hours compared to 56 (<0.002). Preterm twins received less daily skin-to-skin contact (mean 157 ±66 minutes each versus 244±109) (<0.001). There were no differences in receiving mother's own milk, exclusively direct breastfeeding or perceived breastfeeding self-efficacy.

CONCLUSION: Breastfeeding was initiated as successfully in preterm twins as singletons as the mothers' milk production doubled.