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Obesity

The research on excess weight in men and its reach into hormones, fertility, and metabolic health.

18Studies

18Human studies

2026Most recent

8Countries

The effect of obesity interventions on male fertility: a systematic review and meta-analysis.

Human reproduction update2026n = 32 studies included

Meta AnalysisHuman

This study set out to review how different weight loss methods affect male fertility in men with obesity. It looked at 32 studies that compared lifestyle changes, medications, and bariatric…

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BMI is associated with sperm quality and sex hormones in men: a meta-analysis.

Frontiers in endocrinology2025n = 8,443 men (3,467 normal BMI, 3,444 overweight, 1,532 obese)

Meta AnalysisHuman

This meta-analysis (a study that statistically pools many earlier studies) looked at how body mass index (BMI, a weight-for-height number used to flag over- or under-weight) relates to sperm quality…

Better Fertility Higher Testosterone Low Testosterone

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