Male Infertility
Low Sperm Motility
Low sperm motility, also known as asthenozoospermia, is a common cause of male infertility. When sperm are unable to swim effectively, the chances of natural fertilization are reduced — but with the right treatment, conception is still possible for many couples.
When to Seek Fertility Advice
- • Trying to conceive for 12 months without success
- • Semen analysis showing low motility
- • History of reproductive tract infections
- • Previous failed fertility treatments
What is Low Sperm Motility?
Sperm motility refers to the ability of sperm to move through the female reproductive tract and reach the egg. Low motility means that fewer sperm are moving in the correct forward direction, or that their movement is too weak or sluggish to successfully fertilize an egg. Both the percentage and quality of movement matter in fertility assessment.
Common Symptoms
- Difficulty conceiving naturally
- Abnormal semen analysis report
- Low sperm swimming speed
- Reduced percentage of motile sperm
- No obvious physical symptoms
- History of reproductive infections
Causes of Low Sperm Motility
Several medical, genetic, and lifestyle factors can impair sperm movement. A thorough evaluation helps identify the root cause and guides the most effective treatment approach.
Hormonal imbalance affecting sperm development
Varicocele (enlarged veins in the scrotum)
Genetic or chromosomal abnormalities
Infections of the reproductive tract
Lifestyle factors such as smoking, alcohol, or drug use
Obesity and sedentary lifestyle
Exposure to heat, radiation, or environmental toxins
Antisperm antibodies attacking sperm movement
Diagnosis
Diagnosis begins with a detailed semen analysis that assesses sperm count, motility, morphology, and volume. If motility is found to be low, further tests may include hormone panels, scrotal ultrasound, genetic screening, and antisperm antibody testing to identify contributing factors.
How It Affects Fertility
For fertilization to occur naturally, sperm must be able to swim through the cervix, uterus, and fallopian tubes to reach the egg. Poor motility significantly reduces this ability. Even when sperm count is normal, low motility alone can be a key barrier to natural conception.
Treatment Options
Treatment for low sperm motility is tailored to the severity of the condition and the couple's fertility goals. Our specialists develop a personalised plan to improve the chances of a successful pregnancy.
Lifestyle Modification
Quitting smoking, reducing alcohol, maintaining a healthy weight, and avoiding heat exposure to the groin area can meaningfully improve sperm motility.
Medical Treatment
Antioxidant supplements, hormonal therapy, and treatment of underlying infections may help improve sperm movement and overall semen quality.
Surgical Treatment
If varicocele is identified as a contributing factor, surgical correction can improve sperm motility in many cases.
IUI Treatment
Intrauterine insemination uses washed, motile sperm placed directly in the uterus, improving the chances of fertilization for mild motility issues.
IVF / ICSI
In moderate to severe asthenozoospermia, ICSI — where a single sperm is injected directly into the egg — bypasses the need for natural sperm movement entirely.
Sperm Selection Techniques
Advanced sperm selection methods such as IMSI or microfluidics may be used to identify the best motile sperm for assisted reproduction procedures.