The number of sperm in men has fallen sharply worldwide within four decades. A meta-study by the Hebrew University of Jerusalem HUJI is based on data from over 57,000 men from 53 countries.
According to this study, the average sperm count fell from 101.2 million to 49 million sperm per milliliter of semen between 1973 and 2018. As the scientists working with Hagai Levine report in the specialist magazine Human Reproduction Update, the data also show that the number of sperm is declining more and more rapidly. Sperm count is currently declining at a rate of 1.1 percent per year.

The reason for the decline could be the increased intake of the female sex hormone estrogen via the drinking water. Women who take birth control pills excrete this hormone in their urine. Because sewage treatment plants cannot filter it out of the wastewater, the hormone ends up in people’s drinking water.
Source: forschung-und-wissen.de

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