FT Edit presents: Global sperm counts are falling. This scientist believes she knows why
Life and Art from FT Weekend
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The Effect of Sperm Counts on Fertility
Swan was an expert witness in a series of court cases about DES, an under-condisrupting drug widely prescribed until the 1970s to lower the risk of miscarriages. Not all scientists accept the premise that sperm counts have fallen. Some critics argue that even if the drop is real, the impact on a man's prospects of fathering a child has been overstated. Swan rebuts this, pointing out that her most recent work suggests sperm counts are falling worldwide.
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