This generally refers to the inability of the sperm-producing part of the testicles (the seminiferous elithelium) to make adequate numbers of mature sperm. This failure may occur at any stage in sperm production for a number of reasons. The testicle may completely lack the cells that divide to become sperm (Sertoli Cell-Only Syndrome). There may be an inability of the sperm to complete their development (maturation arrest). Sperm may be made in such low numbers that few, if any, successfully travel through the ducts and into the ejaculated fluid (hypospermatogeneses). This situation may be caused by genetic abnormalities, hormonal factors, or varicoceles.

Even in the case where the testes are only producing low numbers of sperm, the sperm may be harvested and used in conjunction with advanced reproductive techniques to attempt a pregnancy.

Testicular failure can cause inadequate numbers of mature sperm. Please consult with our reverse vasectomy doctor for the proper treatment course.