And babies who eat, sleep, and wake in erratic patterns tend to be a bit more challenging in terms of temperament, too! (babycenter.com)
If sleep training is taking longer than two weeks, if you are seeing no improvement or only consistently erratic patterns in your baby's sleep, it's important to check with your pediatrician. (sohoparenting.com)
arrhythmia An altered and usually erratic pattern in a normal rhythm, such as the pace of an individual's heartbeats. (sciencenewsforstudents.org)