However , in men with nonobstructive azoospermia , sperm is found in about 50 % of cases .
In men with obstructive azoospermia , sperm is found in all sites and in all locations on the FNA map .
In men with nonobstructive azoospermia , sperm is found in about 50 % of cases .
In men with obstructive azoospermia , sperm is found in all sites and in all locations on the FNA map .