无精症若何检查(国外英文资料).docVIP

无精症如何检查 How to check for anspermia Anspermia accounts for about 15 to 20 percent of men with infertility, and there are two broad categories. One is the function of the testicle itself, which is called primary non-sperm or non-obstructive anspermia. The second is that the testicular sperm function is normal, but because of the obstruction of the vasectomy, the spermatozoa cannot be excreted, called obstructive anspermia. What is the examination of anspermia, which can be examined in the following areas Semen examination The result of semen examination is the basis of the diagnosis of anspermia. Two copies of semen were collected after abstinence 2-3d. How many also has important significance of semen volume, in clinical examination, semen less semen collection is not completely, therefore, is the major reason for the regular collection 2 specimens. Endocrine examination For patients with anspermia, the serum FSH and T should be examined first, and if they are normal, no further endocrine examination is required. If the value of T is lower than normal, it should be checked by the line of LH and prolactin. Now some scholars think that inhibin B produced by testicular sertoli cells, can directly reflect more than FSH testicular sperm production function, therefore inhibin B should also become the routine inspection of male infertility patients. Genetic examination With the rapid development of molecular biology techniques, with Y chromosome specific sequence tags sites (STS) line primer PCR amplification can be detected then could not tell the difference of the Y chromosome is missing, many studies have found that non obstructive patients with idiopathic azoospermia or severe lower sperm disease have a Y chromosome AZF region lack, confirmed AZF gene loss is one reason for the spermatogenesis dysfunction. 4, testicular biopsies There are two main types of testicular biopsy: scrotal incision biopsy and puncture biopsy. There are advantages and disadvantages of the two,