WHAT IS SPERM MOTILITY?
Sperm motility is the ability of sperm to move efficiently. This is important in fertility because sperm need to move through the woman’s reproductive tract to reach and fertilize her egg. Poor sperm motility can be a cause of male factor infertility.
There are two kinds of sperm motility, referring to the way the individual sperm swim.
PROGRESSIVE MOTILITY refers to sperm that are swimming in a mostly straight line or large circles.
NON-PROGRESSIVE MOTILITY refers to sperm that do not travel in straight lines or that swim in very tight circles.
For the sperm to get through the cervical mucus to fertilize a woman’s egg, they need to have progressive motility of at least 25 micrometers a second.
Poor sperm motility or asthenozoospermia is diagnosed when less than 32 percent of the sperm are able to move efficiently.
WHAT IS LOW SPERM MOTILITY
Low sperm motility means that sperm finds it difficult to move toward the egg, and this can lead to fertility problems.
HOW DOES IT AFFECT FERTILITY?
Male factor infertility is when an issue with the man’s biology makes him unable to impregnate a woman. It accounts for between 40 to 50 percent of infertility cases and affects around 7 percent of men.
Male infertility is usually the result of deficiencies in the semen, the most common of which are:
• low sperm count or oligospermia
• poor sperm motility
• abnormal sperm shape or teratospermia
Around 90 percent of male infertility issues are caused by low sperm count, but poor sperm motility is an important factor also.
CAUSES OF LOW MOTILITY
The causes of low sperm motility vary, and many cases are unexplained.
Damage to the testicles, which make and store sperm, can impact on the quality of sperm.
Common causes of testicle damage include:
• infection
• testicular cancer
• testicular surgery
• an issue a man is born with
• undescended testicles
• injury
Varicocele, a condition of enlarged veins in the scrotum, has also been associated with low sperm motility.
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Your Sincerely,
Dr. Ajibade,
B.Sc. Public Health & Alternative Medicine (Cameroon); Diploma in Naturopathy (USA); Diploma in Acupuncture (India & Sri Lanka); mLASTMB (Lagos), mNCPNM (Nigeria), mNANTMP (Nigeria), mACTMPWA(West Africa).
Medical Director,
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I. A. & S. Natural Medicare Int’l Ltd.