Quick answer: The women’s health gap is the difference in health outcomes, research and care between women and men. A 2024 World Economic Forum and McKinsey Health Institute report found women spend about 25% more of their lives in poor health than men, and linked the gap partly to underinvestment in research and data (McKinsey Health Institute/WEF, 2024). Closing it takes better science, better care and better education.
Women make up half of the population. Yet for much of modern medicine, women’s bodies were treated as a variation on the “standard” male body. The results still show up today: in how long women live in poor health, in how long conditions take to diagnose, and in how little many women are taught about their own bodies.
This is what we mean by half the population, not half the research.
What is the women’s health gap?
The phrase describes several connected problems:
- Outcome gap: women live longer than men on average but spend more of those years in poor health.
- Research gap: women were historically underrepresented in clinical research, and conditions that mainly affect women have received less study.
- Knowledge gap: many women never receive clear education about menstruation, reproductive health, menopause or how conditions can show up differently in their bodies.
Women’s health gap statistics
The most comprehensive recent analysis comes from the McKinsey Health Institute and the World Economic Forum (McKinsey Health Institute/WEF, 2024):
- Women spend 25% more of their lives in poor health than men.
- Closing the gap could boost the global economy by an estimated $1 trillion a year by 2040.
- The report points to gaps in research and data, including how studies are designed and whether results are analyzed by sex, as root causes.
The gap affects HIV, too. Globally, women and girls make up 53% of people living with HIV (UNAIDS 2025).
How did the research gap happen?
Women were excluded from early drug trials
In 1977, U.S. Food and Drug Administration guidance recommended excluding women “of childbearing potential” from early-phase drug trials, a definition broad enough to include most adult women (NIH Office of Research on Women’s Health). The intent was to protect potential pregnancies. The effect was that many medicines reached the market with limited data on how they worked in women’s bodies.
The law changed in 1993
In 1993, the FDA lifted that restriction, and Congress passed the NIH Revitalization Act, which required NIH-funded clinical research to include women and members of minority groups and, where appropriate, to analyze whether results differ (NIH ORWH).
Progress is real, but incomplete
Inclusion rules have improved representation in many studies. But as the 2024 McKinsey/WEF analysis notes, gaps remain in how data is collected and analyzed and in which conditions get studied (McKinsey Health Institute/WEF, 2024). Some research is decades behind where it should be.
How the gap shows up in everyday life
Statistics can feel abstract. In daily life, the women’s health gap often looks like this:
- “That’s just normal.” A girl with very painful periods is told to tough it out, and no one explains which symptoms deserve a doctor’s attention.
- No one mentioned it. A woman in her mid-40s notices changes in sleep, mood and her cycle and has no idea they may be signs of perimenopause.
- Too embarrassed to ask. Someone has a question about reproductive health but doesn’t feel comfortable raising it in a short appointment.
- Information overload. A quick online search returns ads, myths and conflicting advice instead of clear, sourced answers.
None of these situations can be fixed by education alone. But in each one, accurate information helps a person recognize a problem sooner, ask a better question and get to the right care. That is the part of the gap we work on every day, and it is the part every one of us can help close.
Where education fits
Research and care are essential. So is something simpler: women knowing what’s normal for their own bodies, and when to speak up.
Puberty and periods
Many girls start puberty between ages 8 and 13, with a first period around age 12 on average (HealthyChildren.org). Girls who are prepared know what to expect and know when something isn’t typical. Our guide How to Talk to Your Kids About Puberty helps parents start early.
Reproductive health care
The American College of Obstetricians and Gynecologists recommends a first gynecologic visit between ages 13 and 15, mostly as a conversation (ACOG). Knowing what to expect reduces fear. See Your First Gyn Visit, Explained. For contraception basics, read Contraception Options.
Menopause
Menopause is confirmed after 12 months without a period, at an average age of 52 in the U.S., and the transition often begins in the mid-40s (Office on Women’s Health). Yet many women say no one prepared them for perimenopause symptoms such as hot flashes or sleep changes. Our article Menopause & Midlife Health answers common questions in plain language.
Help close the gap with knowledge
We don’t run clinical trials, but we do make sure women and girls get accurate, judgment-free information about their bodies at every stage, from puberty to menopause. Your gift keeps that education free.
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Dr Sex Ed (DR SEX ED AI UNIVERSITY INC) is a registered 501(c)(3) nonprofit, EIN 33-4612296. Gifts are tax-deductible to the extent allowed by law.
What Dr Sex Ed does about it
We’re a health education nonprofit, so we’re honest about our role: we don’t fund clinical research. We focus on the knowledge gap, so women and girls can understand their bodies and advocate for themselves:
- Classroom programs that teach puberty, body literacy and how to access care, starting in grade 6.
- Free guides, including our Body Basics Guide and First Gyn Visit guide, in our resources library.
- Adult education on reproductive health and midlife changes.
- Dr Ed, a free AI health educator for ages 13+ (under 13 with a parent’s consent), where women can ask questions privately any time at drsexed.ai.
See all our programs.
What you can do
- Learn your own body’s baseline and track changes.
- Ask questions at appointments. Bring a written list.
- Ask whether research included women when reading about a new treatment.
- Support organizations working on research, care and education.
- Share this article with someone who’d find it useful.
Frequently asked questions
What is the women’s health gap?
It’s the difference in health outcomes, research and care between women and men. Women spend about 25% more of their lives in poor health than men, according to a 2024 McKinsey Health Institute and World Economic Forum report.
Why were women left out of medical research?
In 1977, FDA guidance excluded women of childbearing potential from early-phase drug trials, largely to protect potential pregnancies. That limited data on how many treatments affected women.
When did the U.S. require women to be included in clinical research?
In 1993, the NIH Revitalization Act required NIH-funded clinical research to include women and minorities. The FDA also lifted its 1977 restriction that year.
How much could closing the women’s health gap be worth?
The McKinsey Health Institute and World Economic Forum estimate closing the gap could add about $1 trillion a year to the global economy by 2040.
Does Dr Sex Ed fund women’s health research?
No. We are a health education nonprofit. We focus on closing the knowledge gap through free, evidence-based education for girls and women at every life stage.
Sources
- McKinsey Health Institute & World Economic Forum. Closing the women’s health gap: A $1 trillion opportunity to improve lives and economies. 2024. https://www.mckinsey.com/mhi/our-insights/closing-the-womens-health-gap-a-1-trillion-dollar-opportunity-to-improve-lives-and-economies
- NIH Office of Research on Women’s Health. History of Women’s Participation in Clinical Research. https://orwh.od.nih.gov/toolkit/recruitment/history
- UNAIDS. Global HIV & AIDS statistics fact sheet, 2025. https://www.unaids.org/en/resources/documents/2025/UNAIDS_FactSheet
- AAP HealthyChildren.org. Physical Development in Girls: What to Expect. https://www.healthychildren.org/English/ages-stages/gradeschool/puberty/Pages/Physical-Development-Girls-What-to-Expect.aspx
- ACOG. Your First Gynecologic Visit. https://www.acog.org/womens-health/faqs/your-first-gynecologic-visit
- Office on Women’s Health. Menopause basics. https://womenshealth.gov/menopause/menopause-basics