The article explores the controversy surrounding declining male fertility, with scientists divided on the causes.Prof Hagai Levine's research suggests a 50% drop in testosterone levels over 50 years, sparking concerns about environmental toxins, pollution, and modern lifestyles.

However, experts like Prof Allan Pacey argue that obesity and diabetes may better explain the trends, as studies show no consistent decline in sperm counts when using more reliable measurement techniques.

The piece highlights the role of endocrine-disrupting chemicals, microplastics, and air pollution in potential reproductive health impacts, while cautioning against overinterpretation of data.

It also addresses the challenges in diagnosing male infertility, the rise of unregulated fertility treatments, and emerging technologies like AI-driven sperm selection.

Despite debates, the article underscores the need for balanced approaches to address both environmental and lifestyle factors affecting male reproductive health.