Babies who drink breast milk during the night that was expressed in the daytime may take longer to fall asleep, due to changes in the level of the sleep-inducing hormone melatonin in the milk
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 …