Also known as oligozoospermia, it is a condition when the sperm count in a man’s ejaculate is lesser than the minimum required for conception. According to WHO, oligospermia occurs when the sperm count is less than 20 million sperms per milliliter. This condition is the most common cause of decreased chances of conception and infertility in men.
The primary symptom of oligospermia is sub-fertility or infertility. Other symptoms vary depending on the underlying cause of oligospermia; as in sexually transmitted diseases symptoms can include burning with urination, testicular pain and a thick discharge from the penis. With a varicocele, symptoms may include dilated veins in the scrotum and swelling of the scrotum.