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Highlights

  • Roe v. Wade Overturned
  • Reproductive Health Impact Study
  • Adding It Up
  • Abortion Worldwide
  • Guttmacher-Lancet Commission
  • Monthly Abortion Provision Study
  • US policy resources
  • State policy resources
  • State legislation tracker

Reports

  • Global
  • United States

Articles

  • Global research
  • US research
  • Policy analysis
  • Guttmacher Policy Review
  • Opinion

Fact Sheets

  • Global
  • United States
  • US State Laws and Policies

Data, Videos & Visualizations

  • Data center
  • Videos
  • Infographics
  • Public-use data sets

Peer-reviewed Journals

  • International Perspectives on Sexual and Reproductive Health (1975–2020)
  • Perspectives on Sexual and Reproductive Health (1969–2020)

Global

  • Abortion
  • Contraception
  • HIV & STIs
  • Pregnancy
  • Teens

US

  • Abortion
  • Contraception
  • HIV & STIs
  • Pregnancy
  • Teens

Our Work by Geography

  • Global
  • Africa
  • Asia
  • Europe
  • Latin America & the Caribbean
  • Northern America
  • Oceania

Who We Are

  • About
  • Staff
  • Board
  • Job opportunities
  • Newsletter
  • History
  • Contact
  • Conflict of Interest Policy

Media

  • Media office
  • News releases

Support Our Work

  • Make a gift today
  • Monthly Giving Circle
  • Ways to Give
  • Guttmacher Guardians
  • Guttmacher Legacy Circle
  • Financials
  • 2024 Impact Report

Awards & Scholarships

  • Darroch Award
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  • Bixby Fellowship
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Data Scientist

Isaac Maddow-Zimet

Portrait of Isaac Maddow-Zimet

Isaac Maddow-Zimet joined the Guttmacher Institute in 2010. He leads the Institute’s efforts to identify new approaches for leveraging, generating, integrating and visualizing data, and is the co-lead of the Research Division’s Reproducibility Core, a team devoted to improving the computational reproducibility and transparency of Guttmacher’s research. His main areas of research have included abortion measurement, estimation of pregnancy statistics in the United States, pregnancy desires, and adolescent sexual health and behavior, and he has published articles in Demography, JAMA Pediatrics, Population Research and Policy Review and the Journal of Adolescent Health, among others. He received his BA in sociology and Iberian studies from Wesleyan University, and his MS in applied statistics from New York University.

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Selected Publications

  1. A violet background with an outline of the United States in the center
    April 2025 Report

    Stability in the Number of Abortions from 2023 to 2024 in US States Without Total Bans Masks Major Shifts in Access

    Isaac Maddow-Zimet and Kimya Forouzan
  2. Medication Abortion
    February 2025 Research Article

    The Role of Medication Abortion Provision in US States Without Total Abortion Bans, 2023

    Isabel DoCampo , Rachel K. Jones and Isaac Maddow-Zimet Perspectives on Sexual and Reproductive Health (University of Ottawa)
  3. An image of four charts (bars, pie)
    October 2024 Report

    Pregnancies, Births and Abortions in the United States, 1973–2020: National and State Trends by Age

    Doris W. Chiu, Isaac Maddow-Zimet and Kathryn Kost
  4. An outline of the United States
    September 2024 Policy Analysis

    Florida’s Six-Week Ban Led to Substantial Drop in Clinician-Provided Abortions

    Kelly Baden and Isaac Maddow-Zimet
  5. An outline of the United States
    March 2024 Policy Analysis

    Despite Bans, Number of Abortions in the United States Increased in 2023

    Isaac Maddow-Zimet and Candace Gibson
  6. An outline of the United States
    December 2023 Policy Analysis

    The High Toll of US Abortion Bans: Nearly One in Five Patients Now Traveling Out of State for Abortion Care

    Kimya Forouzan, Amy Friedrich-Karnik and Isaac Maddow-Zimet
  7. An outline of the United States
    September 2023 Policy Analysis

    New State Abortion Data Indicate Widespread Travel for Care

    Isaac Maddow-Zimet, Kelly Baden, Rachel K. Jones, Isabel DoCampo and Jesse Philbin
  8. December 2022 Research Article

    Randomized experimental testing of new survey approaches to improve abortion reporting in the United States

    Laura D. Lindberg, Isaac Maddow-Zimet, Jennifer Mueller and Alicia VandeVusse Perspectives on Sexual and Reproductive Health (University of Ottawa)
  9. July 2022 Policy Analysis

    Even Before Roe Was Overturned, Nearly One in 10 People Obtaining an Abortion Traveled Across State Lines for Care

    Isaac Maddow-Zimet and Kathryn Kost
  10. September 2021 Report

    Pregnancies and Pregnancy Desires at the State Level: Estimates for 2017 and Trends Since 2012

    Kathryn Kost, Isaac Maddow-Zimet and Ashley C. Little

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