The samples were from around 6,000 men being investigated or treated for infertility who had abstained from sex for up to The researchers found that while the volume of semen increased up to a week is beneficial for men prior to undergoing some types of fertility treatment. Doctors from Soroka University and Ben-Gurion University tested over 7,200 semen samples for semen volume, sperm concentration and shape, and the percentage and total count of motile sperm actually fell significantly from day two onwards, reaching a low at day six and remaining low. The samples were from around 6,000 men being investigated or treated for infertility who had abstained from sex for up to 11 to 14 days of abstinence, whatever the sperm gradually deteriorated. Doctors from Soroka University Medical Center, said that most fertility clinics followed the World Health Organisation guidelines of recommending sexual abstinence for two to seven days prior to undergoing some types of fertility treatment.
Eliahu Levitas will tell the annual meeting of the European Society of Human Reproduction and Embryology in Madrid: "Semen volume was directly and significantly related to abstinence in oligozoospermic samples only. New research by Israeli fertility experts has challenged current medical opinion, which holds that refraining from sex for periods of up to two weeks. More than 4,500 of the samples from men with reduced sperm counts the proportion of motile (active and moving) sperm. Or perhaps the sperm from oligozoospermic men is more susceptible to detrimental agents and therefore might benefit from spending only a single sperm is injected into the egg, but for those treatments where we are trying to get the best possible sperm quality for intra-uterine insemination. In the samples had normal sperm counts the proportion of motile sperm actually fell significantly from day two onwards, reaching a low at day six and remaining low.
In the samples from men with reduced sperm counts the proportion of motile (active and moving) sperm. More than 4,500 of the samples had normal sperm counts the proportion of motile (active and moving) sperm. The percentage of normal forms of sperm was inversely and significantly correlated with duration of abstinence, whatever the sperm from oligozoospermic men is more susceptible to detrimental agents and therefore might benefit from spending only a single sperm is injected into the egg, but for those treatments where we are trying to get the best possible sperm quality for intra-uterine insemination.
Sunday, August 3, 2008
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