Key Takeaways

The way a man loses weight could determine whether it helps his fertilityMen who lost weight through diet and exercise had better sperm qualityHowever, bariatric surgery did not appear to improve sperm quality

WEDNESDAY, Nov. 5, 2025 (HealthDay News) — Losing weight is considered one way to improve male fertility, but how guys drop pounds also matters, a new evidence review says.

Men who lost weight through diet and exercise did wind up with better sperm quality, even with modest weight loss, researchers recently reported in the journal Human Reproduction Update .

However, losing weight through bariatric surgery did not cause any notable positive changes to sperm quality, even though men lost substantial amounts of weight quickly, researchers found.

“Lifestyle changes

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