Probiotic Supplementation in Extremely Preterm Infants in Scandinavia

The intervention product, commercially known as ProPrems®, is a combination of (one billion freeze-dried bacteria per 0.5 g in a maltodextrin base powder: Bifidobacterium infantis Bb-02 (DSM 33361) 300 million, Bifidobacterium lactis (BB-12®) 350 million, and Streptococcus thermophilus (TH-4®) 350 million will be given daily once to eligable infants born extremly preterm (\<28weeks of gestation) once they tolerate 3ml of enterla feeds until the age of 34 weeks of gestation.