BS O02 - Impact of Bariatric surgery on Obesity Indices and Reproductive Hormones: A Prospective Study in Morbidly Obese Women

Abstract Background Obesity, defined by a BMI of 30 kg/m² or higher, is influenced by genetics, socio-economic, and cultural factors. Genetic predispositions affect metabolism and energy regulation, while environmental factors like sedentary lifestyles and poor food environments worsen obesity. Obesity disrupts hormonal balances, impacting sex hormone levels and menstrual cycles, leading to infertility in women. This hormonal imbalance affects oocyte quality and ovulation. Bariatric surgery offers significant weight loss and metabolic improvements, enhancing reproductive hormone profiles and insulin sensitivity. Our study explores how sleeve gastrectomy affects BMI and hormone levels, aiming to understand its impact on obesity management and reproductive health. Method This prospective observational study examines the effects of laparoscopic sleeve gastrectomy on reproductive hormones and ovarian function in 32 morbidly obese women, adhering to Helsinki Declaration ethics. Participants, aged 18-50 with no menopause or chronic illness, consented to the study. Exclusions included those with polycystic ovary syndrome, recent reproductive organ surgery, or recent infertility medications. The study assessed changes in BMI, antral follicles, anti-Müllerian hormone, and reproductive hormones before surgery and at 6 and 12 months post-surgery. Blood samples and transvaginal ultrasounds were conducted preoperatively and at 6 and 12 months postoperatively to monitor outcomes. Results The study involved participants with an average age of 33 and a mean BMI of 42.12. Significant changes were observed post-sleeve gastrectomy at 6 and 12 months (p < 0.001). At 6 months, BMI decreased by 9.24 units, AMH levels dropped from 3 to 2.5 ng/mL, and antral follicle counts in both ovaries declined. By 12 months, BMI decreased by 16.47 units, AMH levels fell to 2 ng/mL, and antral follicle counts further reduced. Hormonal changes included increases in FSH, LH, and estradiol, while SHBG levels rose, and free testosterone levels decreased significantly. Conclusion Individual hormone responses to weight loss and surgery necessitate personalized obesity treatments. Tailoring surgical approaches and care to hormonal profiles can optimize outcomes and reduce complications. Monitoring AMH levels post-surgery can offer insights into reproductive effects, aiding clinical management and counseling for women with obesity-related infertility. We highlight the significant impact of sleeve gastrectomy on physiological parameters in obese individuals, especially regarding reproductive health and metabolic regulation. The findings enhance understanding of the changes associated with bariatric surgery and its potential benefits for metabolic and reproductive health.