The male is the causative factor in about 50% of childless marriages (Dubin and Amelar 1971). The reasons for male infertility or subfertility are, in decreasing order, varicoceles, testicular failure, insufficient semen volume, endocrine and sexual problems, vasal obstruction, cryptorchism, etc. Following an interview with the couple and a thorough physical examination of the male, the analysis
... [Show full abstract] of the ejaculate gives preliminary information. Azoospermia is the principle indication of an obstruction of the reproductive tract. Other causes of azoospermia are retrograde ejaculation, neurogenic disorders, or defective or absent spermatogenesis. Azoospermia due to primary testicular pathology is often associated with an elevated FSH level: Klinefelter’s Syndrome, bilateral mumps orchitis, torsion or trauma of both testicles, or radiation injury; however, with maturation arrest azoospermia may be accompanied by a normal FSH (Amelar et al. 1971). Cryptorchism leads to infertility in 37%–100% of cases, depending on the effectiveness of hCG therapy or the patient’s age at time of surgery (Schirren 1971).