ArticleObesity surgery2019
Lack of Improvement of Sperm Characteristics in Obese Males After Obesity Surgery Despite the Beneficial Changes Observed in Reproductive Hormones.
Article in Obesity surgery, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 2 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
14 citing papers in PubMed, 2 syntheses or guidelines pooled it, 24 citations in OpenAlex.
- The effect of obesity interventions on male fertility: a systematic review and meta-analysis.Human reproduction update · 2026Pooled it
- Bariatric Surgery Does Not Improve Semen Quality: Evidence from a Meta-analysis.Obesity surgery · 2022Pooled it
- STAT3/MTND4 Mediates Obesity-Related Seminal Vesicle Injury and Impaired Sperm Motility Via Reactive Oxygen Species /Mitochondrial Dysfunction.Reproductive sciences (Thousand Oaks, Calif.) · 2026Article
- Treatment Options for Improving The Semen Quality in Obese Men: A Scoping Review.Journal of multidisciplinary healthcare · 2026Review
- Effect of Bariatric Surgery on Male Infertility: An Updated Meta-Analysis and Literature Review.The world journal of men's health · 2025Article
- Weight Loss as Therapeutic Option to Restore Fertility in Obese Men: A Meta-Analytic Study.The world journal of men's health · 2025Article
- The Beneficial Changes on Inflammatory and Endothelial Biomarkers Induced by Metabolic Surgery Decreases the Carotid Intima-Media Thickness in Men.Biomolecules · 2022Article
- The role of leptin and low testosterone in obesity.International journal of impotence research · 2022Review
- Obesity Surgery Improves Hypogonadism and Sexual Function in Men without Effects in Sperm Quality.Journal of clinical medicine · 2022Article
- The Role of Adiponectin in the Resolution of Male-Obesity-Associated Secondary Hypogonadism after Metabolic Surgery and Its Impact on Cardiovascular Risk.Biomedicines · 2022Article
- Triglycerides/Glucose Index Is Associated with Sperm Parameters and Sperm DNA Fragmentation in Primary Infertile Men: A Cross-Sectional Study.Metabolites · 2022Article
- Analysis of the Functional Aspects of Sperm and Testicular Oxidative Stress in Individuals Undergoing Metabolic Surgery.Obesity surgery · 2021Article
- Circulating Zinc and Copper Levels are Associated with Sperm Quality in Obese Men after Metabolic Surgery: A Pilot Study.Nutrients · 2020Article
- Associations of sex hormone levels with body mass index (BMI) in men: a cross-sectional study using quantile regression analysis.Asian journal of andrologyArticle
Corrections and comments
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Authors and funding
7 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundEven though obesity surgery normalizes circulating testosterone concentrations in males with obesity-associated secondary hypogonadism, its impact on spermatogenesis remains controversial. We aimed to evaluate sperm characteristics in obese men after bariatric surgery as well as changes in reproductive hormones.
methodsTwenty severely obese men (body mass index (BMI) ≥ 35 kg/m
resultsAfter surgery, serum total testosterone, calculated free testosterone, inhibin B, and kisspeptin increased, whereas fasting insulin, HOMA-IR, and leptin concentrations decreased. Despite these improvements, sperm volume showed a small decrease after surgery, while the rest of sperm characteristics remained mostly unchanged. Abnormal sperm concentration persisted in 60% of the patients.
conclusionsSperm characteristics may not improve after bariatric surgery despite the beneficial changes of reproductive hormones.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.