All azoospermic males should be screened for cystic fibrosis mutations before intracytoplasmic sperm injection.

Abstract excerpt

We assessed the frequency of CFTR mutations in groups with varying degrees of sub-fertility and compared these groups to a fertile male group with proven paternity. Screening for CFTR mutations should be routine for all azoospermic males, irrespective of obstructive or non-obstructive etiology, prior to proposing ICSI treatment. CFTR testing has no value in the investigation of non-azoospermic infertile males.

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