Global Research Trends on the Impact of Obesity on Male Infertility: A Bibliometric Analysis

Why It Matters

Understanding the scholarly landscape guides funding, collaboration, and clinical strategies to address the growing public‑health challenge of obesity‑related male infertility.

Key Takeaways

• Publication output surged after 2012, reaching ~120 papers annually by 2025
• China produces most papers; the United States has highest citation impact
• Harvard, Copenhagen, and Adelaide form a multi‑polar institutional network
• Research now centers on oxidative stress, gut‑testis axis, epigenetics, and integrated therapies
• Dual‑map overlay shows shift from clinical to molecular genetics focus

Pulse Analysis

The global obesity epidemic has reshaped reproductive health research, prompting scientists to investigate how excess adiposity compromises sperm quality and fertility. By aggregating over 1,200 peer‑reviewed articles from Web of Science and Scopus, the bibliometric analysis provides a macro‑level view that goes beyond individual study findings. It reveals how the field transitioned from descriptive epidemiology to mechanistic inquiry after 2012, reflecting broader shifts in biomedical research toward molecular and systems biology. This contextual backdrop helps investors and policymakers gauge the maturity of the discipline and anticipate emerging opportunities.

Geographic and institutional patterns underscore the competitive dynamics of the research ecosystem. While Chinese institutions dominate raw publication counts, U.S. researchers achieve greater citation impact, suggesting higher per‑paper influence. Funding analysis shows the NIH and China’s NSFC as primary sponsors, highlighting the role of sustained public investment in driving high‑impact work. The multi‑polar network—anchored by Harvard, the University of Copenhagen, and the University of Adelaide—facilitates cross‑continental collaborations that accelerate knowledge transfer and methodological innovation, especially in cutting‑edge areas like epigenomics and microbiome science.

Looking ahead, four hot topics are reshaping the agenda. Oxidative‑stress‑induced sperm DNA fragmentation is being linked to poorer assisted‑reproductive outcomes, while the gut‑testis axis opens new therapeutic avenues through diet and microbiome modulation. Paternal epigenetic inheritance suggests that pre‑conception weight loss could improve offspring health across generations. Finally, integrated intervention strategies—combining bariatric surgery, targeted antioxidants, and lifestyle coaching—are emerging as precision‑medicine approaches. Stakeholders who align research funding, clinical trials, and commercial development with these trends will be best positioned to mitigate the fertility costs of obesity.