Difference or no difference?
That is the analysis!

The following article ‘An analysis of the outcome of Intra-cytoplasmic sperm injection (ICSI) using Fresh or Frozen sperm’ indicates that there is no difference in using fresh versus frozen sperm in success rates from ICSI. Also, the study suggested that there is no difference in outcome if the cause of azoospermia is related to a blockage or not.