Emily Oster's profile photo

Emily Oster

Providence

Professor of Economics and Writer at Freelance

Founder and Writer at ParentData

Data-Driven Pregnancy and Parenting Economist @BrownUniversity Author #ExpectingBetter, #Cribsheet, #FamilyFirm, #TheUnexpected CEO of https://t.co/Q4hHIERBD5 👇

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Articles

  • 3 weeks ago | parentdata.org | Emily Oster

    We’re introducing our baby to solids soon, and in my reading I came across all of this information about FPIES. It really freaked me out! What is it, and is this something I should worry about? —Scared enough thank youFPIES stands for “food-protein induced enterocolitis syndrome.” It is a condition, most common in infants, in which a food hypersensitivity generates vomiting, diarrhea, and dehydration.

  • 4 weeks ago | parentdata.org | Adam Davis |Emily Oster

    What causes baby acne? My three-week-old has baby acne all over his face, ears, head, and chest, and it’s getting worse by the day! His doctor says it’ll go away on its own. Is there a treatment? —LaurenThis is such a common concern that at the two-week well visit, I usually warn parents in a little schpiel I give about things that might show up that shouldn’t alarm you. The short answer is: your doctor is right. Baby acne usually goes away on its own, and most of the time, no treatment is needed.

  • 1 month ago | parentdata.org | Gillian Mueller Goddard |Emily Oster

    I am in the earlier stages of perimenopause and have started to notice an explosion of cherry hemangiomas on my torso. This also happened to me when I was pregnant, but they largely cleared up afterward. I seem to think everything is a perimenopause symptom these days, but it seems like hormones are doing opposite things compared to pregnancy, so is that the case?

  • 1 month ago | parentdata.org | Breonna N. Slocum |Emily Oster

    Does AMH (anti-Mullerian hormone) matter? Does a low AMH, close to but under 1, mean it is not possible to conceive naturally? Any data on the chances? —AMH CuriousThis is an area that has pretty good data. AMH is not predictive of your chances of conceiving without assistance. First, for background, AMH is produced by the small developing eggs in the ovary that potentially can be ovulated.

  • 1 month ago | parentdata.org | Kolbe Hancock |Emily Oster

    I had my first IVF transfer a few days ago, and the fertility clinic, along with several other online sources, says to refrain from intercourse or orgasm for anywhere from five days to “at least two weeks.” I have no history of miscarriage, bleeding, or other complications, and I successfully carried my first child to term two years ago. How solid is the research behind this recommendation?

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Emily Oster
Emily Oster @ProfEmilyOster
23 Jun 25

GLP-1s are everywhere -- what are the impacts on fertility? What if you get pregnant on one of them? What about breastfeeding? We've got data and (some) answers: https://t.co/aJiT0YHsWP

Emily Oster
Emily Oster @ProfEmilyOster
2 Jun 25

The fake AI citations in the MAHA report are obviously embarrassing. But worse is what this says about how they are evaluating the real studies -- so much work in this space is just garbage correlation-not-causation. I cannot imagine they are thinking about evidence quality.

Emily Oster
Emily Oster @ProfEmilyOster
26 May 25

Sunscreen -- is it safe, and what are the benefits? Just in time for Memorial Day... https://t.co/kQ6N3byrN8