Doctors from Soroka University and Ben-Gurion University in 7200 tested the semen sample to determine semen volume, sperm concentration and shape, as well as the percentage and total number of active sperm.
Samples of about 6,000 men are actually investigated to determine the level of fertility of men who refrained from sex for two weeks.
More than 4,500 samples had normal sperm counts, while the rest are categorized as poor starting from the stage of mild, moderate to severe. The researchers found that when the volume of semen increased because 11 to 14 days did not have sex, sperm shape is gradually getting worse.
Samples from men with poor sperm counts started to decrease its quality on the second day onwards, reaching a low point after the sixth day and getting worse.
Semen volume was significantly correlated with duration of not having sex, whereas sperm motility was inversely associated with sex in a long time not poor sperm samples alone.
That most fertility clinics followed the guidelines of the World Health Organization (WHO) which recommends abstinence for two to seven days before undergoing fertility treatment.
Our data challenge this prohibition in the treatment of male infertility. What we found is not so relevant recommendations. In IVF treatment in which only one sperm is injected into the egg, we should try to get the best quality sperm. For these patients, we recommend sex abstinence ideally no more than two days.
Tthat there is no firm agreement among researchers why sperm can be damaged and less feasible. Might be due to oxidative DNA damage, such as smoking or other destructive substances.
Or perhaps the sperm from men who have poor sperm are more vulnerable to damaging substances, so it would be great if the sperm spend a short time in the reproductive tract.
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