Baby Care Center

Everything You Need to Know.
Nothing You Don't.

Evidence-based guides for new parents, written with pediatric guidance and designed for the moments when you need clear answers fast.

👶 Newborn Basics 🌙 Sleep & Development 💓 Health Monitoring

👶 Newborn Basics

The essential things to know in the first 30 days

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Featured Guide

What's Actually Normal for a Newborn? Understanding Sleep, Feeding, Breathing & Vital Signs

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.

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Newborn Foundations
Newborn Vital Signs Explained: Heart Rate, Breathing Rate, Temperature & Oxygen Levels

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.

0–3 months 6 min read
Newborn Foundations
Your Baby Changes Every Day: How Newborn Development Shapes Sleep, Movement & Behavior

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.

0–3 months 7 min read

🌙 Sleep & Development

Evidence-based sleep guidance from newborn to toddler

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Sleep & Development
Why Babies Sleep So Much: The Science Behind Infant Sleep

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.

Newborn 6 min read
Sleep & Development
Infant Sleep Cycles Explained: What Happens While Your Baby Sleeps

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.

0–12 months 5 min read
Sleep & Development
Signs Your Baby May Be Overtired (Before the Fussiness Starts)

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.

0–12 months 5 min read
📱
Bundl Sleep Data Tip Use your Bundl app's sleep timeline to identify your baby's natural sleep cycle length. Most babies cycle every 45–50 minutes. Knowing when they'll surface to light sleep lets you plan your response.

💓 Health Monitoring

Understanding the numbers that tell you how your baby is doing

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Oxygen & Breathing
Understanding Infant Oxygen Saturation (SpO₂): What Every Parent Should Know

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.

0–12 months 6 min read
Heart Rate
Normal Baby Heart Rate by Age: During Sleep, Feeding & Activity

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.

0–12 months 6 min read
Temperature
Understanding Your Baby's Temperature: What's Normal and When to Call the Pediatrician

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.

0–12 months 7 min read
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