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Temporary skin-to-skin contact between preterm infant and the mother is increasingly used in neonatal medicine to promote bonding. It is not known at which gestational age (GA) and postnatal age skin-to-skin contact outside the incubator is a sufficiently warm environment and is tolerated by preterm infants without a decrease in body temperature, oxygen consumption (VO2) increase, or unrest. We conducted a prospective clinical study of 27 spontaneously breathing preterm infants of 25-30-wk GA. Rectal temperature (Trecta), VO2 (indirect calorimetry), and activity were continuously measured in the incubator (60 min), during skin-to-skin contact (60 min), and back in the incubator (60 min) in wk 1 and 2 of life. In wk 1 the change in Trectal during skin-to-skin contact was related to GA (r=0.585, p=0.0027): infants of 25-27-wk GA lost heat during skin-to-skin contact, whereas infants of 28-30 wk gained heat and their mean Trectal during skin-to-skin contact was 0.3 degrees C higher than before (p &lt; 0.01). No significant changes of VO2 or activity occurred. In wk 2 the infants' VO2 was higher than in wk 1, but VO2 during skin-to-skin contact was the same as in the incubator. Only small fluctuations in Trectal occurred. In wk 2 all infants slept more during skin-to-skin contact than in the incubator (p &lt; 0.02). We conclude that, for preterm infants of 28-30-wk GA, skin-to-skin contact was a sufficiently warm environment as early as postnatal wk 1. For infants of 25-27-wk GA skin-to-skin contact should be postponed until wk 2 of life, when their body temperature remains stable and they are more quiet during skin-to-skin contact than in the incubator.

pediatric research

Effects of Gestational and Postnatal Age on Body Temperature, Oxygen Consumption, and Activity during Early Skin-to-Skin Contact between Preterm Infants of 25-30-Week Gestation and Their Mothers