Doctors have performed hysterectomies for more than a century, yet new research shows the surgery may carry a hidden metabolic cost for women long after they leave the operating room.
Quick Take
- A French study of 82,472 women found a 23% higher diabetes risk when both the uterus and ovaries were removed together.
- A separate U.S. cohort of over 67,000 women linked hysterectomy alone to a 13% higher diabetes risk, regardless of ovary removal.
- A Korean study of nearly 35,000 women found an even steeper 37% jump in diabetes cases after hysterectomy.
- Researchers stress these are observational links, not proof the surgery causes diabetes.
What The Largest Studies Actually Found
The headline number making the rounds comes from a French cohort of 82,472 women. Researchers tracked 2,318 new type 2 diabetes cases and found a 23% higher risk, but only among women who had both their uterus and ovaries removed together. Hysterectomy alone, without ovary removal, did not show a statistically significant link in that same analysis.
That nuance matters because it is easy to flatten a complex finding into a scary headline. The original research draws a clear line between removing the uterus and removing the ovaries along with it. Readers deserve to know which procedure the number actually describes before deciding how worried to be.
Other Major Cohorts Tell A Similar But Not Identical Story
A U.S. study published in the American Journal of Epidemiology followed 67,130 postmenopausal women for an average of 13.4 years. Diabetes showed up in 12.5% of women who had a hysterectomy compared with 10.32% of those who did not. The adjusted risk increase was 13%, and it held true whether or not the ovaries were also removed.
A Korean cohort pushed the number even higher. Among 7,088 women who had a hysterectomy compared with 27,845 who did not, diabetes struck at a rate of 9.12 per 1,000 person-years versus 6.78 per 1,000 person-years. That works out to a 37% higher adjusted risk. A separate U.S. analysis of reproductive history found a smaller but still notable 17% increased risk tied to hysterectomy or ovary removal, even after researchers adjusted for body weight in midlife.
The Confounding Problem Doctors Can’t Ignore
Women are not randomly assigned to have a hysterectomy. They have the surgery because of fibroids, endometriosis, heavy bleeding, or cancer, and those conditions often travel alongside obesity, inflammation, or other metabolic risk factors. Separating what the surgery itself does from what already made these women more likely to develop diabetes remains one of the hardest problems in this entire body of research.
Hormone therapy adds another layer. Broader research on menopause shows that hormone therapy tends to lower diabetes risk rather than raise it, with one large analysis of over 1.4 million women finding a 17% reduced risk among those using it. That raises an important question for women who lose ovarian hormones through surgery rather than natural menopause, and whether replacing those hormones afterward changes their long-term risk picture.
What This Means For Women Weighing Surgery
None of this argues against hysterectomy when doctors recommend it for cancer, severe bleeding, or other serious conditions. It does argue for honest conversations before surgery about metabolic monitoring afterward. Women and their doctors deserve full information, not a stripped-down headline number that quietly drops the detail about which organs were actually removed.
Common sense says a 13-year, 67,000-woman study and a 35,000-woman Korean cohort pointing the same direction is worth taking seriously, even while the exact size of the risk stays unsettled. Patients facing this surgery should ask their doctors directly about diabetes screening down the road, rather than assume the conversation ends once the operation is over.
Sources:
mindbodygreen.com, academic.oup.com, pmc.ncbi.nlm.nih.gov, ncbi.nlm.nih.gov
