Assisted conception in the azoospermic male.

The advent of intracytoplasmic sperm injection (ICSI) has offered new solutions for the management of patients with azoospermia. Surgical sperm recovery combined with ICSI has allowed many men with azoospermia to father their own biological children. Azoospermia can be classified as obstructive and non-obstructive, with investigations, management and success rates varying markedly between the two forms. In certain cases of obstructive azoospermia surgical reconstruction remains a viable option, whereas cases with congenital obstruction need to be screened for mutations of the cystic fibrosis gene. In most cases of obstruction sperm can be retrieved from the epididymis using percutaneous epididymal sperm aspiration (PESA). If PESA is unsuccessful, testicular sperm extraction (TESE) is successful in all cases. With non-obstructive azoospermia, the genetic basis has been investigated intensely. Screening for karyotypic abnormalities as well as Y microdeletions is recommended. Irrespective of the histological diagnosis, focal spermatogenesis can be observed in 40-50% of cases using multiple testicular biopsies.