Reproductive crisis: sperm cells halved in 50 years

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Reproductive crisis: sperm cells halved in 50 years

The demographic crisis that the northern countries of the Planet are experiencing contrasts with the exponential demographic increase of the developing countries and the poorest countries, but today a reproductive crisis is taking place, with spermatozoa halved in 50 years.

Male infertility is progressively affecting the more developed countries. In the last fifty years, sperm counts around the world have even halved. In general, men have fewer spermatozoa that have reduced motility and risk not giving guarantees of reproduction.

Since the beginning of the century, this rate of decline has more than doubled. To affirm all this is a research just published in the Human Reproduction Update journal and which involved researchers from all over the world.

We looked at 223 studies based on sperm samples from over 57,000 males in 53 different countries. For the first time now it shows how men in Latin America, Asia and Africa are also suffering from this crisis with current sperm count.

Professor Hagai Levine, lead author of the study from the Hadassah Braun School of Public Health at the Hebrew University of Jerusalem, explained: "We have a serious problem on our hands which, if not mitigated, could threaten the survival of humanity."

Reproductive crisis: sperm cells halved in 50 years

The data from 1973 to 2018 showed that the number of spermatozoa decreased on average by 1.2% per year, those from 2000 show a decline of over 2.6% per year. According to the authors, the possible causes include a global crisis related to our modern environment and lifestyle and the disruptive role of chemicals on our hormonal and reproductive systems.

The data coming out of the research are alarming and indicate a potential fertility crisis that could threaten humanity's natural reproduction in the future. The causes are still being investigated, but there is no doubt that the increase in chemicals, pollutants, unhealthy air and effects also linked to the climate crisis, according to experts, could hit the mark.

Several studies also point out, for example, that an important number of chemicals have been found in urine samples. Previous analyzes had indicated that this decline in sperm count mainly concerned places and cultures with advanced economies.