Oligospermia is a male fertility issue defined as a low sperm concentration in the ejaculate. Low sperm concentration or "sperm count" is the number of sperm in a presc of ejaculate (typically milliliters or mL). As defined by the World Health Organization (WHO) in 1999, a low sperm count is less than 20 million sperm/mL.

THE HERBS USED TO AID FERTILITY
No individual herb is considered especially useful for promoting fertility. Rather, more than 150 different herbs, usually given in complex formulas comprised of 15 or more ingredients, are used in the treatment of infertility with the purpose of correcting a functional or organic problem that caused infertility. The design of the formulas has varied somewhat over the centuries, based on prevailing theories and available resources, and individual practitioners have a preference for particular herbs, thus accounting for some of the variations among formulas that are recommended. However, differences among individuals being treated accounts for the greatest variation in the selection of herbs and formulas to be used. There are some "exotic" materials that are frequently found in fertility formulas, such as deer antler and sea horse, but the prominent materials are derived from roots, barks, leaves, flowers, and fruits. Formulas for men and for women tend to be different, but there is considerable overlap in the ingredients used.

THE SUCCESS RATE FOR CHINESE HERB TREATMENTS
Although the outcome for any given individual cannot be predicted, the clinical studies conducted in China indicate that about 70% of all cases of infertility (male and female) treated by Chinese herbs resulted in pregnancy or restored fertility. Depending on the particular study and the types of infertility treated, success rates ranged from about 50% up to more than 90%. Included in these statistics are cases of infertility involving obstruction of the fallopian tubes, amenorrhea, absent ovulation, endometriosis, uterine fibroids, low sperm count, nonliquification of semen, and other causes. In China, due to the greater experience with using herbs, the ability to directly integrate traditional and modern methods of therapy, and the willingness of individuals to consume relatively large doses of herbs, the success rates are probably somewhat higher than can be achieved in the U.S. at the present time. Nonetheless, U.S. practitioners have had many experiences of success in treating infertility.