Sperm motility examination is a part of semen analysis. Sperm motility means sperm cells’ movement ability. Semen analysis is a type of laboratory test that is done to evaluate your semen fluid and sperm cells. Semen analysis evaluates semen fluid’s volume, appearance,pH, color and sperm cell characteristics like sperm motility, sperm morphology, sperm concentration, sperm count . Your doctor may request semen analysis when you have problem getting pregnant or to check the success of vasectomy operation ( a type of birth control method).
Sperm cells are motile cells, this means that sperm cells have movement ability. Sperm motility describes how well your sperm cells swim forward through the vaginal canal to reach the egg. Sperm motility is an important factor in fertility.
Sperm cells move and swim in the vagina by the help of their tails. Also semen fluid liquefies within 20-30 minutes and make sperm cells swim easier to the egg. Vagina has a acidic environment, semen is a basic fluid and protects sperm cells from this acidic condition and help them to move and fertilize the egg.
Progressive and non-progressive motility
Sperm cells should swim on a straight line to reach the egg, this straight movement is called progressive motility .
In non-progressive motility sperm cells don’t swim in a straight line, they swim on a tight circular way.
Normal sperm motility
In semen analysis test sperm cells are evaluated and at least 40% of motile sperm cells are accepted as normal. In normal conditions sperm cells move 25 micrometers a second in progressive motility. At the same time 32% of sperm cells should have progressive motility to say that sperm motility is normal.