Oligospermia is a male fertility issue characterized by a low sperm count. Other aspects of the sexual health of men with this condition are typical. This includes the ability to get and maintain an erection, as well as produce ejaculation at orgasm.

The following conditions are considered low and diagnosed as oligospermia

  • Mild oligospermia is 10 to 15 million sperm/mL.
  • Moderate oligospermia is considered 5 to 10 million sperm/mL.
  • Severe oligospermia is diagnosed when sperm counts fall between 0 and 5 million sperm/mL.


Several conditions and lifestyle factors can increase a man’s risk for oligospermia.


Enlarged veins in a man’s scrotum can disrupt blood flow to the testicles. This can cause the temperature in the testicles to increase. Any increase in temperature can negatively impact sperm production. About 40 percent of men with low sperm numbers or low sperm quality count have this common issue.


Viruses like sexually transmitted infections can reduce the sperm amount in semen.

Ejaculation issues

While many men with oligospermia have typical ejaculations, some ejaculation problems may reduce sperm count.Retrograde ejaculation is one such issue. This occurs when semen enters the bladder instead of leaving from the tip of the penis.

Other things that may interfere with typical ejaculation include:

  • injuries
  • tumor
  • cancer
  • past surgeries


Beta blockers, antibiotics, and blood pressure medications may cause ejaculation problems and reduce sperm count.

Hormone issues

The brain and the testicles produce several hormones that are responsible for ejaculation and sperm production. An imbalance in any of these hormones may lower sperm count numbers.

Exposure to chemicals and metals

Pesticides, cleaning agents, and painting materials are a few of the chemicals that can reduce sperm count. Exposure to heavy metals, such as lead, can cause this problem, too.

Overheating testicles

Sitting frequently, placing laptops over your genitals, and wearing tight clothing may all contribute to overheating. An increase in temperature around the testicles may temporarily reduce sperm production. It’s unclear what long-term complications may occur.

Drug and alcohol use

The use of some substances, including marijuana and cocaine, may reduce sperm counts. Excessive drinking can do the same. Men who smoke cigarettes may have lower sperm counts than men who do not smoke.

Weight problems

Being overweight or obese increases your risk for low sperm counts in several ways. Excess weight can directly reduce how much sperm your body can make. Weight problems may also interfere with hormone production.

Oligospermia Treatment

Treatment can improve sperm numbers and quality. These treatment options include:


Varicocele often require surgery. During the procedure, your doctor will close off the enlarged veins. They’ll redirect blood flow to another vein.


Medications, including antibiotics, treat infections and inflammation. Treatment may not improve sperm numbers, but it may prevent greater sperm count drops.

Lifestyle changes

Losing weight and maintaining a healthy weight may improve sperm numbers. It may also reduce your risk for many other health conditions. Stop using drugs, alcohol, and tobacco to improve sperm amounts, too.

Hormone treatment

A variety of medications, injections, and lifestyle changes can restore hormones to a healthy level. When hormone levels recover, sperm numbers may improve.

Reproduction assistance

If you’re still unable to get pregnant, you and your partner can work with a fertility specialist to explore your options. ater sperm count drops.