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A mother looks concerned as she answers her cell phone in at her desk in an office.

Updated on Jul. 9, 2025

10 minute read

Why Schools Always Call Moms

Emily Oster, PhD

A newborn infant holds a parent's thumb in a closeup.

Jul. 14, 2023

2 minute read

Will a Baby Born at 37 Weeks Be OK?

Emily Oster, PhD

A person with a c-section scar reclines while two children snuggle with her.

Jul. 14, 2023

2 minute read

Should I Worry About Having a Third C-Section?

Emily Oster, PhD

A parent looks on as a pediatrician gives a smiling baby a vaccination.
In the news

Updated on Sep. 16, 2025

3 minute read

Should My Baby Get the Hepatitis B Vaccine?

Emily Oster, PhD

A freezer door shows bags and bottles of frozen breastmilk.

Updated on Oct. 21, 2025

2 minute read

Should I Throw Away Unused Thawed Breast Milk?

Emily Oster, PhD

A group of babies listening to ParentData on headphones

Jul. 12, 2023

30 minute read

Random Acts of Data

Emily Oster, PhD

Personal view from a pregnant woman of her stomach from above. She is holding a stuffed rabbit and ultrasound.

Jul. 10, 2023

6 minute read

Three Big Changes in Pregnancy Data

Emily Oster, PhD

A close-up image of a gas stove against a yellow background.

Jul. 7, 2023

2 minute read

Is Benzene from My Gas Stove Poisoning My Family?

Emily Oster, PhD

A teddy bear peaks around navy blue blackout curtains.

Updated on Mar. 19, 2025

2 minute read

Should I Hang Blackout Curtains in My Baby's Room?

Emily Oster, PhD

A baby smiles and tilts head while being held.

Updated on Mar. 19, 2025

2 minute read

When Should I Stop Breastfeeding?

Emily Oster, PhD

A close up shot of a foot stepping onto an old-fashioned scale on a blue rug.

Jul. 3, 2023

7 minute read

Is There a Link Between BMI and Health?

Emily Oster, PhD

A felt illustration of a child in bed with a green monster under the bed.

Jun. 30, 2023

3 minute read

Why Is Bedtime Suddenly Impossible?

Emily Oster, PhD

A hand is seen lowering the blinds in front of a closed window on a hazy day.

Jun. 30, 2023

4 minute read

Will Wildfire Smoke Exposure Increase My Risk of Preterm Birth?

Christopher Worsham, MD

A children's slide and fort are seen, abandoned, on a smokey day.

Updated on Jan. 13, 2025

3 minute read

Can I Take My Kids Outside When There's Wildfire Smoke?

Christopher Worsham, MD

An array of used tissues and cold medicines on a yellow background.

Updated on Nov. 19, 2025

2 minute read

Why Aren't There Better Breastfeeding-Safe Medicines?

Emily Oster, PhD

A colorful wooden children's block puzzle is seen on a light blue background. The last piece is set outside the puzzle.

Jun. 29, 2023

7 minute read

What We Lose When We Find Parenthood

Denisse Myrick