THE BARREN MAN – FOLLICLE STIMULATING HORMONE
If three seminal analyses show that a man has no spermatozoa, a sample of his blood is taken and a hormone called follicle stimulating hormone (FSH) is measured. The blood level of FSH may be high or normal. A high FSH level indicates that the nests in his testes, where the spermatozoa develop, are so damaged that no treatment is possible. A normal FSH level suggests that he may have a blockage in the twisted epididymis or in the vas deferens. If further investigations prove that there is a blockage, it may be possible for a surgeon to cut out the damaged or blocked part of the tube and rejoin the healthy parts using microsurgery. It is likely that this very delicate surgery will enable some men with damaged tubes to father children.
Some men are found to have sperm counts which average less than five million. The blood level of FSH is measured and may be high or normal. Unfortunately, whatever it is, no treatment is as yet available which will improve the count, and pregnancy is unlikely to occur. A few men with counts as low as this have fathered children but it is rare for this to happen.
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