Compositions comprising human milk oligosaccharides for use in a subject to support night sleep duration

A method for improving total night sleep duration or sleep quality in a subject in need thereof, the method comprising administering to the subject a nutritional composition comprising at least one human milk oligosaccharide,

• wherein the at least one human milk oligosaccharide is present in a total amount of 50 mg to 2500 mg/L of the nutritional composition, and
• the total sleep night duration or sleep quality is assessed on the basis of a questionnaire to quantify quantity and quality of sleep (BISQ),
• the subject is an infant or young child that is small for gestational age (SGA) or was born preterm, and
• the at least one human milk oligosaccharide comprises one of
• (i) a mixture of lacto-N-neotetraose (LNnT), lacto-N-tetraose (LNT), and para-lacto-N-neohexaose;
• (ii) a combination of 3′ sialyllactose (3-SL) and lacto-N-tetraose (LNT);
• or
• (iii) a combination of 3′ sialyllactose (3-SL) and a mixture of lacto-N-neotetraose (LNnT), lacto-N-tetraose (LNT), and para-lacto-N-neohexaose.