Articles

Every question Lybadora has published a sourced, direct answer to.

Shared care & caregiving
Do Mothers or Fathers Lose More Sleep in the First Year? What a 12-Month Study Found
A 232-couple study measured mothers' and fathers' sleep separately through the first year: fathers lose more sleep duration, mothers lose more sleep continuity.
3 min read
Routine
Does a Bedtime Routine Actually Help a Baby Sleep? What a Randomized Trial Found
What a 405-family randomized trial found a consistent bedtime routine actually changes: sleep onset, night wakings, and the longest sleep stretch.
3 min read
Newborn
How Many Wet Diapers Should a Newborn Have Each Day?
How many wet diapers a newborn should have by day of life, the AAP's stool count guidance, and what a change in either number can mean.
4 min read
Parenting
How Much Crying Is Normal for a Baby? What the Research Shows
How much a baby cries by week, from a meta-analysis of 8,690 infants, and how colic prevalence falls from 17-25% to under 1% by 3 months.
4 min read
Feeding
How Often Should a Baby Eat? Feeding Frequency by Age
How often a baby should eat at each age, for both breastfed and formula-fed babies, from AAP guidance, and why frequency drops as the amount per feed rises.
3 min read
Parenting
Is Screen Time Ever Okay for a Baby? What WHO Actually Recommends
WHO's screen time guidance by age for children under 5, including the under-1 recommendation of none at all, and what sits alongside it.
3 min read
Parenting
Postpartum Depression: What the Screening Numbers Actually Show
CDC PRAMS data on postpartum depression prevalence and screening gaps, and the AAP's recommendation to screen at the baby's own well-child visits.
3 min read
Newborn
Room-Sharing and Bed-Sharing: What the Evidence Actually Shows
The AAP's evidence on room-sharing and bed-sharing: the roughly 50% risk reduction from room-sharing, and the risk multipliers tied to smoking and bed-sharing.
3 min read
Development
Tummy Time: How Much and How Often Does a Baby Actually Need?
The AAP's tummy time targets by age: when to start, how many sessions a day, and the 15-to-30-minute goal by 7 weeks.
3 min read
Feeding
When to Introduce Peanut and Other Allergens: What the LEAP Study Found
The NIAID's three-tier guidelines for introducing peanut to infants by risk level, built on the LEAP trial's 81% reduction in peanut allergy.
3 min read
Routine
Do Babies Need a Sleep Schedule?
Sleep guidance gives a 24-hour range, not clock times. What the research says about infant sleep variability, and what a rhythm looks like versus a schedule.
3 min read
Feeding
Does a Breastfed Baby Need Vitamin D? The Dose, the Threshold and Why
Which babies need a vitamin D supplement, the exact daily amount, the formula volume that makes it unnecessary, and how the recommendation changes after a year.
3 min read
Feeding
How Long Should Breastfeeding Continue? The Recommendation and the Reality
The WHO recommendation to breastfeed to 2 years and beyond, the exclusive-feeding rates actually recorded worldwide, and what that gap does and does not mean.
4 min read
Baby sleep
How Much Sleep Does a Baby Really Need? The Numbers Behind Infant Sleep
How much should a baby sleep? The evidence behind infant sleep duration, night waking, sleep variability, and what the numbers actually mean for parents.
9 min read
Parenting
Is Your Baby Tracker Measuring What You Think It Is?
Different measurement methods produce different numbers for the same night. What that means for how much weight to put on a tracked figure.
4 min read
Newborn
Why Is There No Official Sleep Recommendation for Newborns?
The AASM sleep-duration consensus starts at 4 months. What that means for newborn sleep numbers, and what is actually worth watching in the first weeks.
4 min read
Development
What Are Developmental Milestones Based On, and What Does 'By 2 Months' Mean?
The 75% threshold behind every milestone checklist, what the CDC 2-month list actually contains, and how to read a milestone a baby has not reached yet.
3 min read
Growth tracking
What Are Baby Growth Charts Actually Based On?
Growth charts explained: the 8,440-child WHO study behind them, the six countries involved, and the difference between a growth standard and a growth average.
4 min read
Feeding
When Should a Baby Start Solid Foods? What the Guidance Actually Says
When do babies start solids? The WHO age recommendation, the meal-frequency targets that come with it, and how few families worldwide actually meet them.
4 min read
Shared care & caregiving
Why Do Two Caregivers Remember the Same Day Differently?
How far parent-reported infant sleep drifts from objective measurement, and what that gap means when several people share the care of one baby.
4 min read

Articles

Do Mothers or Fathers Lose More Sleep in the First Year? What a 12-Month Study Found

Does a Bedtime Routine Actually Help a Baby Sleep? What a Randomized Trial Found

How Many Wet Diapers Should a Newborn Have Each Day?

How Much Crying Is Normal for a Baby? What the Research Shows

How Often Should a Baby Eat? Feeding Frequency by Age

Is Screen Time Ever Okay for a Baby? What WHO Actually Recommends

Postpartum Depression: What the Screening Numbers Actually Show

Room-Sharing and Bed-Sharing: What the Evidence Actually Shows

Tummy Time: How Much and How Often Does a Baby Actually Need?

When to Introduce Peanut and Other Allergens: What the LEAP Study Found

Do Babies Need a Sleep Schedule?

Does a Breastfed Baby Need Vitamin D? The Dose, the Threshold and Why

How Long Should Breastfeeding Continue? The Recommendation and the Reality

How Much Sleep Does a Baby Really Need? The Numbers Behind Infant Sleep

Is Your Baby Tracker Measuring What You Think It Is?

Why Is There No Official Sleep Recommendation for Newborns?

What Are Developmental Milestones Based On, and What Does 'By 2 Months' Mean?

What Are Baby Growth Charts Actually Based On?

When Should a Baby Start Solid Foods? What the Guidance Actually Says

Why Do Two Caregivers Remember the Same Day Differently?