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Sexuality


By Marco Dal Negro

www.mybestlife.com

 

Italiano - English 

 


The Effects of Cell Phone Conversations on the Attention and Memory of Bystanders (2013-04-05)

 

A study conducted at Soroka Medical Center and led by Dr. Eliahu Levitas, Senior physician in the Fertility and In-Vitro Fertilization Unit examined the impact of climate on the quality of sperm and analyzed it in the different months of the year.
The study showed that sperm quality increased in the winter and corresponded to the rise in the number of births in the hospital nine months later.

The study, recently published in the American Journal of Obstetrics & Gynecology, was based on 6,455 semen samples from 6,447 men at Soroka Medical Center. The statistical analysis that sorted the samples according to the season they were taken indicated an increase in the concentration and quality of the sperm in the winter. Motility differences were also found that could influence the chances for pregnancy.
Even though sperm speed was greater in summer than in winter, fewer of these sperm exhibited progressive motility, that is, straight line movement essential for fertility.
Also, in comparing the summer samples with those taken in winter, the winter sperm showed fewer abnormalities.

A comparison of the number of births at Soroka’s Saban Maternity Center, the busiest delivery room in the country, shows seasonal variations that are consistent with the seasonal variations of the sperm samples.

The study presented data on the number of births at Soroka Medical Center from 2005 to 2010, totaling 79,038. The distribution by season showed the highest number of births in the fall (September, October, November), 22,732 in the five years. Whereas in the spring (March, April, May), corresponding to conception the previous summer, the lowest number of births was recorded, 17,753 in the five years.

Dr. Eliahu Levitas, Senior physician in the Fertility and IVF Unit at Soroka Medical Center: “The findings attest to a general increase in the quality of sperm in the winter and a decline in summer. This may be explained by the negative effect of heat on the testicles. The testicles are external to the body, maintaining a temperature 1.5 to 2 degrees Centigrade lower than the body. Couples struggling to conceive should perhaps be more alert to the seasons of the year and increase their efforts particularly in the colder months”.

For more information
American Journal of Obstetrics & Gynecology
Seasonal variations of human sperm cells among 6455 semen samples: a plausible explanation of a seasonal birth pattern
http://www.ajog.org/article/S0002-9378%2813%2900146-4/abstract

(MDN)

 


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