1 To investigate the effect of the treatment of azoospermia with ejaculatory duct obstruction by transurethral resection of ejaculatory ducts.

2 Methods: The changes of 32 male azoospermia patients treated by yuziwan were observed before and after treatment.

3 Objective : to assess the relationship between azoospermia or severe oligozoospermia and Y chromosomal microdeletions.

4 Results: Out of the 72 cases of azoospermia, 13(18.1%) patients with the number and structural aberration of sex chromosome were detected.

5 It has been proved that the deletion of azoospermia factor (AZF) could cause azoospermia or severe oligospermia.

6 The expression change of BOULE gene or the absence of BOULE protein brings on meiosis arrest and spermatogenic failure, which can lead to azoospermia and male infertility.

7 Conclusions: PTSA combined with ICSI is an effective method for treatment of obstructive azoospermia and non-obstructive azoospermia.

8 It is a recommendable method that simple testicular needle aspiration in the men diagnosis and treatment of the men with obstructive azoospermia.

9 Congenital vas deferens ( CAVD ) is an important factor that contributes to obstructive azoospermia and male infertility.

10 Methods Karyotypes were analyzed by chromosome G - banding in 415 infertile patients with azoospermia or severe oligozoospermia.

11 Conclusion:Androgen resistance is one of the important cause for male infertility of oligospermia, particularly severe oligospermia or azoospermia.

12 Objective : To explore the relationship between serum reproductive hormones and aspermacrasia or azoospermia.

13 Methods AZF microdeletion screening was carried out in 42 idiopathic azoospermia patients in Chengdu area by using PCR and gelose gel electrophoresis.

14 Purpose : To evaluate the diagnosis and therapy experience azoospermia.

15 Objective To investigate the usefulness of serum inhibin B for successful testicular sperm extraction (TESE) in patients with non-obstructive azoospermia .

16 Several factors have been proposed for male infertility and spermatogenic failure is confirmed to be a significant one,[www.Sentencedict.com] which typified by idiopathic non-obstructive azoospermia or oligozoospermia.

17 Methods: Chromosomal karyotypes were examined in 199 male patients with oligospermia and azoospermia history by periphery blood lymphocyte culture and G banding.

18 Objective To investigate the clinical value of the determinations of serum sex hormone in the patients with oligospermia and azoospermia.

19 Objective : To investigate the relationship between chromosomal abnormality, AZF microdeletion and azoospermia.

20 To investigate the relationship between spermatogenesis disorder and genetic defects of patients with azoospermia or severe oligospermia.

21 Objective To explore the evaluation of fine needle aspiration cytology ( FNAC ) on testis of azoospermia disease.