Has the semen quality worsened? Well, according to a Spanish study that compares this evolution at the regional level over the last two decades with a sample of 120,000 patients for this purpose –the largest to date for a study of these characteristics– the answer is yes.
The work, led by IVI Bilbao and the IVI Foundation, shows that “the ranking of greatest semen deterioration is led by Madrid, where patients treated at our headquarters located in the capital have experienced a decrease in their semen quality of 76% in the last few Two decades. This means that, each year that passes, it decreases by approximately seven million the total number of progressive motile spermatozoa – an indicator that allows us to know with the greatest certainty the evolution in seminal quality in the period of time analyzed. In this sense, IVI patients treated at our Madrid headquarters They have gone from having about 200 million of the total mobile progressives to about 48 today”, explains Nicolás Garrido, director of the IVI Foundation and supervisor of the study.
These patients are followed by those from the Basque Country, with a decrease in semen quality of 70%; Canarias, with a drop of 47%; and Aragón, with one of 42% since 2000. And, although at the national level the study shows a general deterioration in this sense, the truth is that it fluctuates between the different regions: «Paradoxically, Communities such as Galicia or Catalonia have not seen their quality suffer seminal in the years analysed”, says Garrido.
The parameters analyzed in the spermiograms were the volume of the ejaculate, the concentration of spermatozoa, their motility and the composite indicator of them: the percentage of progressive motile spermatozoa per ejaculate. This last variable is what has made it possible to extract the results of this work with the greatest reliability.