Clinical Report: Bariatric Surgery Improves Menstrual Regularity in Obese Women
Overview
This cross-sectional study of 515 premenopausal women who underwent bariatric surgery found a significant reduction in menstrual irregularities postoperatively, with irregular menstruation rates decreasing from 38.6% to 25.0%. No significant changes were observed in the number of menstruations per year, prolonged menstruation, hyperandrogenic symptoms, or estrogen-based contraception use.
Background
Obesity among women is increasing and is linked to reproductive health issues such as polycystic ovarian syndrome (PCOS), infertility, and menstrual abnormalities. Obese women often experience longer, heavier, and irregular menstrual cycles due to hormonal imbalances including hyperestrogenism. Bariatric surgery (BS) is the most effective treatment for obesity but may have long-term side effects and impact contraception efficacy. Limited studies have evaluated the clinical effects of BS on menstrual and reproductive parameters.
Data Highlights
Parameter
Before Surgery
After Surgery
p-value
Irregular menstruations (%)
38.6
25.0
<0.001
Mean menstruations per year
10.2 ± 3.9
10.4 ± 3.3
0.36
Prolonged menstruations (>7 days) (%)
Not significantly different
Not significantly different
NS
Acne prevalence (%)
Not significantly different
Not significantly different
NS
Hirsutism prevalence (%)
Not significantly different
Not significantly different
NS
Estrogen-based contraception use (%)
14.4
15.0
0.95
Key Findings
Bariatric surgery significantly reduced the prevalence of menstrual irregularities from 38.6% to 25.0% (p < 0.001).
The mean number of menstruations per year remained unchanged after surgery (10.2 vs 10.4; p = 0.36).
No significant changes were observed in prolonged menstruation duration, acne, or hirsutism prevalence post-surgery.
Use of estrogen-based contraception and oral contraceptives did not significantly change after bariatric surgery.
Majority of patients underwent sleeve gastrectomy (70.3%) with a mean excess weight loss of 74.0%.
Clinical Implications
Bariatric surgery can be expected to improve menstrual regularity in obese women, which is an important consideration during preoperative counseling. However, clinicians should be aware that other menstrual characteristics and hyperandrogenic symptoms may not improve significantly. Contraception methods, including estrogen-based options, appear to be used at similar rates before and after surgery, but the impact of surgery on contraceptive efficacy should still be considered.
Conclusion
Bariatric surgery is associated with a significant improvement in menstrual cycle regularity among obese women, without affecting the frequency of menstruations or hyperandrogenic manifestations. These findings support the role of BS in improving reproductive health parameters beyond weight loss.
References
Author/Source/Year -- Effects of Bariatric Surgery on Menstrual Irregularities: A Cross-Sectional Analysis
