Analyse the serum reproductive hormones of azoospermia,and retrospect analyse the reproductive hormones of different outcome of PESA performed for normal chromosome azoospermic patients.

• 分析无精子症患者的生殖内分泌激素水平的变化。对染色体正常的无精子症患者行PESA,并对PESA能否抽吸精子与生殖激素水平进行回顾性分析。