Cardiometabolic Health Among Gastric Bypass Surgery Patients With Polycystic Ovarian Syndrome

• PCOS affects up to 1 in 10 women of reproductive age and is strongly linked to obesity and insulin resistance. This study showed bariatric surgery significantly improved these metabolic problems in a diverse group of women in South Florida.
• For women with PCOS who struggle with weight loss, bariatric surgery addresses root metabolic issues, not just weight, including improvements in insulin resistance and blood sugar control.
• Weight loss of 5-10% can restore ovulation and improve fertility in women with PCOS. The weight loss typically achieved with bariatric surgery far exceeds this threshold.
• The study included women from diverse racial and ethnic backgrounds reflecting South Florida's population.
• Dr. de la Cruz-Muñoz is the senior author.
• For women in Miami living with PCOS and obesity, this study provides peer-reviewed evidence that bariatric surgery can meaningfully improve PCOS-related metabolic complications.

Why This Study Was Needed

Polycystic ovary syndrome (PCOS) is one of the most common hormonal conditions in women and is closely tied to obesity, insulin resistance, diabetes and heart disease. Little was known about how bariatric surgery affects cardiometabolic health in women with PCOS from different ethnic backgrounds.

How the Study Was Done

The team reviewed 389 women with PCOS who had gastric bypass with Dr. de la Cruz-Muñoz’s practice between 2001 and 2009. Two-thirds were Hispanic, 25% non-Hispanic Black and 9% non-Hispanic White. Changes in BMI, cholesterol, triglycerides, HbA1c and liver enzymes were measured from before surgery to one year after.

What the Study Found

• BMI fell by about 9 to 10 points in every group: from 45.5 to 35.5 in Hispanic women, 46.8 to 37.7 in Black women and 45.7 to 36.7 in White women.
• In Hispanic women, total cholesterol fell from 198 to 160 mg/dL, LDL from 121 to 91, triglycerides from 149 to 105, HbA1c from 6.2% to 5.6%, and liver enzymes improved.
• Black and White women had significant drops in total and LDL cholesterol, and Black women in triglycerides.
• After adjustment, improvements did not differ significantly between ethnic groups.

What This Means for Patients

For women with PCOS and severe obesity, gastric bypass improves the metabolic problems that drive long-term heart and diabetes risk. PCOS is also a leading cause of obesity-related infertility, and fertility often improves after weight loss, so planning is important; see Pregnancy and Contraception After Bariatric Surgery.

Clinical Pearls

• Gastric bypass reduced BMI by roughly 10 points within a year in women with PCOS.
• Lipid profiles improved in all ethnic groups.
• Glucose and liver improvements were most evident in Hispanic women.

Strengths and Limitations

This is one of the larger PCOS cohorts in bariatric research and includes a majority of Hispanic women. It is retrospective, follow-up was one year, and reproductive outcomes were not assessed.

Expert Commentary

Many of my female patients have PCOS, and they often come in focused on weight and fertility. This study showed that surgery also improves the cholesterol, blood sugar and liver problems that put them at risk for heart disease and diabetes. It is a whole-body improvement.

— Dr. Nestor de la Cruz-Muñoz