Soulmate Gem
Soulmate Gem
Photo: Iurii Laimin
Summary: Sperm in the first fraction of ejaculate are more numerous, move more and present better quality DNA than those lagging behind.
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Read More »Sperm in the first fraction of ejaculate are more numerous, move more and present better quality DNA than those lagging behind. This is the conclusion of a study led by the Ginemed fertility clinic, which confirms that while the objective of the first fraction is to fertilize the egg, the second phase is so that no sperm from any other male has a chance to fertilize it. A study led by the Ginemed Assisted Human Reproduction Clinic analyses the advantages of using fractions of ejaculate separately in in-vitro fertilization as a way to improve the sample of the semen. The researchers' hypothesis was that, comparing the different fractions of semen in an ejaculation, the first would contain sperm with better seminal parameters and could be used as an effective method for selecting sperm prior to fertilization. "Ejaculate has always been considered as a whole. However, we believe that it is divided into two quite different phases due to its composition and physiological functions, aimed at achieving two equally important actions in terms of reproduction," María Hebles, co-director of the reproduction laboratory at the Ginemed Clinic in Seville and lead author of the study, explains. The first objective of ejaculate would be to fertilize the egg and the second so that no other male has the opportunity to fertilize it. Therefore, the first fraction is characterised as having protective components such as zinc, whereas the second contains elements that can cause damage to sperm. However, for their use in assisted reproduction techniques, the liquid is normally collected in a single container, and therefore both phases are mixed together. This could have a detrimental effect on the sperm population," adds Hebles. Based on this, the specialists asked 40 participants to collect the ejaculate separately into two containers, one for each phase. They then separated the first and the second phase and studied the characteristics of the sperm in each of them. Data suggests that the first phase contains an enhanced subpopulation of sperm, with less sperm DNA fragmentation. Therefore, the use of sperm from this fraction can have a positive effect on fertilization and embryonic development. "As we were expecting, the sperm from the first fraction of ejaculate were faster moving and the count was higher, and more importantly, they had higher DNA integrity than sperm from the second phase," says the researcher. In light of the results, the experts now have a protocol requesting all patients to collect the ejaculate in two fractions, "improving the quality of the sperm used for fertilization simply and at no cost at all," Hebles adds.
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Read More »ova They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm.
Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome. These reproductive cells are produced through a type of cell division called meiosis. During meiosis, a diploid parent cell, which has two copies of each chromosome, undergoes one round of DNA replication followed by two separate cycles of nuclear division to produce four haploid cells. These cells develop into sperm or ova. The ova mature in the ovaries of females, and the sperm develop in the testes of males. Each sperm cell, or spermatozoon, is small and motile. The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell, or ovum, is relatively large and non-motile. During fertilization, a spermatozoon and ovum unite to form a new diploid organism.
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