Thanks for reading ParentData! We recommend going to for the latest features and to easily explore all of my writing on pregnancy and parenting.

What is ParentData? is a guide for parents, people who want to be parents, or anyone who likes to do their research before making a decision. With new articles and Q&As every week—along with over three years’ worth of writing—ParentData aims to give you the numbers and decision-making tools you need to feel more empowered as you make your own pregnancy, parenting, and health choices. 

It’s written by me — Emily Oster. I’m a professor of economics at Brown University and the author of three books on pregnancy and parenting: Expecting Better, Cribsheet, and The Family Firm. I was named to the TIME 100 list of the most influential people in the world. I’m also a mom of two kids who likes to run and doesn’t sleep enough. 

At the end of the day, I hope everything that I write helps future generations of parents feel more empowered and relaxed throughout their journey. 

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With a paid subscription, you’ll get a Q&A newsletter on Wednesdays and full access to everything on, which you can think of as your personal pregnancy and parenting library. When you have a question, like “Is white noise dangerous for babies?” or “When should I treat a fever?” search and chances are good that you’ll find it there. You’ll also have the option of signing up for PregnantData, a weekly email to guide you through your pregnancy.

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Evidence-Based Pregnancy and Parenting


Emily Oster 

Author of Expecting Better, Cribsheet and The Family Firm. Writer of ParentData. Mom. Economics Professor.