Men’s average testosterone levels have halved in last 50 years, say scientists

The Guardian Health Tuesday 07 July 2026, 15:41 UTC By Hannah Devlin Science correspondent 1 min read

Key Points

Researchers warn of ‘major crisis in male reproductive health’ partly driven by obesity and diabetesMen’s average testosterone levels have halved over the past 50 years, according to scientists who say that society is facing a male fertility crisis. Total testosterone levels in men declined by 54% between 1972 and 2019, according to data presented at the annual meeting of the European Society of Human Reproduction and Embryology in London on Tuesday.

Exclusive: Researchers warn of ‘major crisis in male reproductive health’ partly driven by obesity and diabetes

Men’s average testosterone levels have halved over the past 50 years, according to scientists who say that society is facing a male fertility crisis.

Total testosterone levels in men declined by 54% between 1972 and 2019, according to data presented at the annual meeting of the European Society of Human Reproduction and Embryology in London on Tuesday.

Men’s (ORG) the European Society of Human Reproduction and Embryology (ORG) London (LOCATION)

Originally published by The Guardian Health Read original →

Men’s average testosterone levels have halved in last 50 years, say scientists

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