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A parent holding her baby in the background with a breast pump and a bunny toy in focus

Updated on May 2, 2025

3 minute read

Does Pumped Breast Milk Have Fewer Antibodies?

Emily Oster, PhD

A parent helping a baby to walk

Updated on Oct. 8, 2025

7 minute read

When Do Babies Start Walking?

Emily Oster, PhD

Child building with colorful blocks.
In the news

Updated on Aug. 8, 2025

10 minute read

Why Are Autism Rates Going Up?

Emily Oster, PhD

A parent holding and stretching the baby's legs

Updated on Apr. 25, 2025

2 minute read

What Is the Data Behind Growth Charts?

Emily Oster, PhD

A dentist showing kid's dental x-ray to the parent and kid

Updated on Sep. 23, 2025

2 minute read

Does My Child Need Routine Dental X-Rays?

Emily Oster, PhD

A child playing with a bottle of pills
In the news

Updated on Aug. 8, 2025

2 minute read

Does Vitamin A Prevent Measles?

Emily Oster, PhD

A parent talking to a toddler by the sofa.

Updated on Mar. 21, 2025

3 minute read

How Should I Respond When I Don’t Understand My Toddler?

Emily Oster, PhD

Updated on Aug. 6, 2025

1 minute read

Should You Worry About Your Toddler’s Potbelly?

Emily Oster, PhD

A baby sleeping in a crib with pillow and teddy.

Updated on Oct. 8, 2025

2 minute read

Is It Okay for My Toddler to Use a Pillow?

Emily Oster, PhD

A baby sucking the thumb

Updated on Feb. 28, 2025

2 minute read

Does Thumb-Sucking Prevent Allergies?

Emily Oster, PhD

A parent breastfeeding her baby on a couch

Updated on Feb. 21, 2025

2 minute read

Do Prolactin Levels Matter for Breastfeeding Success?

Emily Oster, PhD

Papercut family in hands

Updated on Aug. 18, 2025

8 minute read

Navigating Directed Donor Relationships

Marea Goodman, LM, CPM

Baby lying down with a phone

Updated on Sep. 23, 2025

6 minute read

Should You Worry About Electromagnetic and Radio-Frequency Fields?

Emily Oster, PhD

A platter of animal and plant proteins
In the news

Updated on Aug. 8, 2025

9 minute read

Does Everyone Really Need to Eat More Protein?

Emily Oster, PhD

Changing baby's diaper

Updated on Apr. 1, 2025

2 minute read

How Do I Know What “Normal” Poop Looks Like?

Emily Oster, PhD

A kid getting a vaccine shot
In the news

Updated on Aug. 8, 2025

16 minute read

How Can You Know If Vaccines Are Safe?

Emily Oster, PhD