Evidence-based guides for new parents, written with pediatric guidance and designed for the moments when you need clear answers fast.
The tips here are general — with a Bundl band, our app delivers personalized insights tailored to your baby.
The essential things to know in the first 30 days
Newborns can seem unpredictable in the first days home. This guide covers the basics: how much they sleep, how often they feed, what breathing looks like, and which vital sign ranges are completely normal for a healthy baby.
Heart rate, breathing rate, temperature, and oxygen levels all look very different in a newborn than in older children. Learn the normal ranges, what causes variations, and when a reading should prompt a call to your pediatrician.
Newborn development happens fast. Understanding how rapid neurological and physical changes affect sleep patterns, movement, and behavior helps parents know what to expect week by week.
Evidence-based sleep guidance from newborn to toddler
Newborns sleep 16 to 20 hours a day for a reason. This guide explains the role of sleep in brain development, how infant sleep differs from adult sleep, and why those long stretches matter.
Babies cycle through light and deep sleep differently than adults, which explains why they stir frequently. Learn what's happening in each stage and how sleep architecture changes in the first year.
An overtired baby is harder to settle than a tired one. Knowing the early cues that signal it's time to sleep, before fussiness peaks, makes a real difference in your baby's ability to settle and rest well.
Understanding the numbers that tell you how your baby is doing
SpO₂ monitoring measures how much oxygen is in your baby's blood. This guide explains what normal readings look like, what causes fluctuations, and what levels should prompt immediate attention.
A newborn's resting heart rate is naturally higher than an adult's and changes with activity and sleep. Here's the complete breakdown by age, plus what patterns during feeding and rest actually mean.
Fever in a newborn is handled differently than in older children. This guide covers normal temperature ranges, how to take an accurate reading, and the specific thresholds that require a call to your baby's doctor.
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