In Spain, the semen quality of the men It has fallen, it is a fact that has been studied for years. What has now been shown is that, in addition, the number of motile sperm is different depending on location geographical.
This has been demonstrated by a study multicenter presented by the doctor in Biology and expert in Assisted Reproduction and Bioethics, Rocío Núñez Calonge at the 31st World Congress on Controversies in Obstetrics, Gynecology and Infertility (COGI), held in Vienna.
“There is currently a concern about decreased semen quality of men and, specifically, the number of sperm, which already began in the 90s with the publication of a work that collected data for 50 years,” said the researcher.
The study analyzed a total of 872 male samples who came to perform the semen analysis for the fertility study that included: volume, sperm concentration and total and active mobility.
“There is currently concern about the decline in semen quality in men”
Furthermore, the investigation wanted to demonstrate the existence of differences in semen quality depending on geographical location. “In order to verify this, we have carried out a study comparing the quality of semen in 11 centers in Spain located in Alicante, Madrid, Lérida, Almería, Málaga, Valencia, Zaragoza, Murcia, Granada, Cádiz and Asturias,” explained the expert.
The average age of the patients was 38 years and with their samples “statistically significant differences were found between the different centers regarding the volumethe sperm concentration and the total mobility“, described Dr. Núñez Calonge.
Semen by autonomous communities
Regarding sperm concentration, patients of Almeria, Malaga and Oviedo are the ones who better data presented. On the contrary, those of Cádiz, Lleida and Granada presented the concentration more low.
But, more important than the sperm concentration is the total number of motile sperm that is in the ejaculate, “since that is the parameter that is related to the semen quality or the possibility of fertility,” explained Rocío Núñez Calonge.
In this sense, the men of Oviedo presented the best data (102 million sperm) and those of Granada, the worst (43 million sperm). The difference is statistically significant.
“This study has revealed significant differences in the quality of semen of men from different Spanish communities. Since the determination of the different parameters has been carried out with the same methodology, the differences cannot be due to variations between laboratories“said the doctor.
At the moment the causes are unknown Of the differences, “an explanation could be lifestyle or other environmental factors,” commented the expert.