Levels of the sleep-inducing hormone melatonin in breast milk change throughout the day. Drinking expressed milk at a different time to when it was pumped may therefore cause a baby to take longer to fall asleep at night or sleep more during the day
12 December 2022
Babies who drink expressed breast milk can have disrupted sleep patterns if they consume the milk at a different time to when it was pumped. This may be due to them receiving a mistimed dose of hormones that influence sleep-wake cycles.
Infants are born without circadian rhythms. They rely on external cues, such as routines and changes in light levels, to help them develop a sense of night and day.
A group of German researchers previously found human breast milk …
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