Hagai Levine

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Spermatazoa: something that’s going on in a man’s body one month may be totally different from what’s happening the next month. Illustration: SciePro/iStock/Getty

Male scientists have long waxed poetic on the contents of their testes. “Sperm is a drop of brain,” wrote the ancient Greek writer Diogenes Laertius. (...)

Children watch as medical workers take swab tests for Covid-19 at an ultra-Orthodox Jewish school in the central Israeli city of Rechovot, on June 25th. Photograph: Gil Cohen-Magen/AFP via Getty Images

As countries around the world anxiously consider how to reopen schools, Israel, one of the first to do so, illustrates the dangers of moving too preci(...)

Children wearing plastic face visors in class at Kinugawa Elementary School in Nikko, Japan. Photograph: Carl Court/Getty Images

Schools all over the world closed their classrooms and sent children home in the early days of the pandemic. Many have returned, many are preparing to(...)

A more accurate read is now possible on declining sperm counts. Photograph shows the beginning of fertilisation as a single sperm combines with an ovum

Although falling male sperm counts have been reported in the developed world since 1992, the first systematic review and meta-analysis of sperm count (...)

Dr Hagai Levine, from the Hebrew University of Jerusalem, who co-led the research, said the  study “is an urgent wake-up call for researchers and health authorities around the world to investigate the causes of the sharp ongoing drop in sperm count, with the goal of prevention.” Photograph: Hebrew University/PA

Sperm counts of Western men are in a “shocking” downward spiral that poses a potential threat to fertility in industrialised countries, a major study (...)