Doctors found that the concentration of germ cells, one of the main indicators of male fertility, decreased by about 50% between 1973 and 2018 in almost all regions of the world.
And this is not only in developed countries, as previously thought. The results of scientific work on this subject were published in the journal Human Reproduction Update.
The journal quotes Hagai Levin, a professor at the Hebrew University of Jerusalem: “We have recorded a serious decrease in the concentration of germ cells that has taken place over the past half century, and in the current century this process has accelerated significantly, and we cannot say what led to this phenomenon, but it is possible, this may be due to disturbances in the formation of germ cells inside the embryos, as well as toxins and bad habits.
According to the World Health Organization, about 10-15% of married couples in Western countries cannot continue childbirth due to the infertility of one of the spouses, and the percentage of infertility between men and women is approximately equal. Most of them lose their fertility at the age of 40-55, which is associated with bad habits and other lifestyle features, as well as heredity.
And Israeli doctors 5 years ago found that the typical concentration of male germ cells (a factor that reflects the ability to conceive a child) has decreased over the past few decades in the developed countries of the West, as well as in Russia, Mexico and other countries.
In their new scientific study, Israeli scientists and their colleagues from the US, Brazil and Europe obtained similar data for a large number of countries located in Africa, Latin America, West, South and Southeast Asia, where they analyzed data on male fertility. collected by researchers and physicians in these countries between 1973 and 2018.
In total, Professor Levin and his colleagues analyzed more than 800 scientific papers, the authors of which in one way or another touched on the problems of male infertility and carried out appropriate practical measurements. Scientists were able to obtain data from several hundred measurements of the concentration of male germ cells, which were carried out in third world countries over the past half century.
The analysis showed that the concentration of germ cells decreased not only among the population of prosperous and developed countries, but also in almost the rest of the world. On average, this indicator has decreased by 50%, and since 2000 it began to decline by 2.64% annually, which is more than double the previous figures (1.16% from 1973 to 2000).
According to scientists, the results obtained indicate the presence of problems associated with male fertility at the global level, and indicate the possibility of their exacerbation in the near future, which indicates the need for an urgent study of the reasons for this decline, that it is necessary to prepare programs to help avoid a sharp increase in the number of patients. male infertility in the coming decades.