Can Weight Loss Surgery Improve Your Reproductive Health? New Research Says Yes
Published September 2026 | Source: University of Surrey, published in Obesity Surgery journal
A new study from the University of Surrey has found something that many women struggling with obesity and reproductive health issues will find deeply significant — bariatric surgery does not just help you lose weight. It may also restore your menstrual cycle, reduce polycystic ovaries and improve your chances of a healthy pregnancy.
Here is what the research found — and why it matters.
What the study looked at
Researchers at the University of Surrey studied 84 women aged 18 to 45 who were living with obesity and underwent bariatric surgery — either gastric bypass or gastric sleeve. They followed these women over 24 months, tracking their weight, hormones, menstrual cycles and reproductive health. They also followed 18 women living with obesity who did not have surgery, for comparison.
What they found
The results were striking across several areas.
First, the weight loss itself was significant — women lost an average of more than 30 kilograms over the course of 12 to 24 months after surgery.
But beyond the scales, the changes in reproductive health were remarkable. The number of women who had polycystic ovaries dropped dramatically after surgery — and by 24 months, polycystic ovaries persisted in only 10% of women who had the condition before surgery. That means 90% of women with polycystic ovaries saw significant improvement or complete resolution.
Women who had previously experienced irregular periods reported that their cycles became more regular after surgery. And excess body hair — known as hirsutism and a common and distressing symptom of polycystic ovaries — had resolved in the majority of women by the 12 month mark.
Perhaps most significantly for women hoping to start or grow a family — 17 women went on to have healthy pregnancies following surgery.
Why does this happen?
Obesity directly disrupts hormone levels — affecting the menstrual cycle, ovulation and fertility. When excess weight is lost through bariatric surgery, hormone levels begin to rebalance. The body essentially gets a chance to reset — and for many women, that reset includes their reproductive system.
As the researchers noted, conditions such as irregular periods, polycystic ovaries and hormonal imbalances that are driven by obesity can improve significantly without the need for additional medication — simply as a result of the weight loss that surgery makes possible.
What the researchers recommend
The University of Surrey research team is now recommending that women who undergo bariatric surgery be offered preconception care and reproductive counselling as part of their post-surgery support — recognising that a large proportion of women having bariatric surgery are of reproductive age and may be planning a pregnancy in the coming years.
What this means for you
If you are living with obesity and also struggling with irregular periods, PCOS, excess body hair or fertility challenges — this research suggests that addressing the weight itself may be the most powerful step you can take for your reproductive health. Not another hormone medication. Not another round of fertility treatment. A permanent solution to the underlying cause.
Can Weight Loss Surgery Improve Your Reproductive Health? The answer is YES, it definitely CAN and DOES!
At Weight Loss Latvia we work with women every day who carry not just excess weight, but the hormonal and reproductive consequences that come with it. If this resonates with your story, we would love to have a conversation.
Weight loss surgery is a single, one-time procedure — and when supported by a healthy mindset and real lifestyle changes, it offers something diets and medication simply cannot: a lasting, permanent solution for severe obesity.
💬 Contact us for a free, private consultation!
Source: University of Surrey / Obesity Surgery Journal, September 2026
