The impact of early testicular sperm extraction or cryopreservation on the outcome of intracytoplasmic sperm injection--a randomized controlled study.

Purpose: To compare the outcome of sperm extraction 24 h before ovum pickup and on the day of oocyte retrieval.

Methods: A controlled study was performed to compare the outcome of 90 sperm extractions and in vitro sperm injection cycles performed in 54 patients.

Results: Available fresh sperm for the sperm injection procedure and cryopreservation obtained on the day of ovum pickup were similar to sperm collected 1 day before (33.