Repeated micro TESE was performed on both testicles at another hospital for patients with Cell Tri-Only, which is considered the most severe type of non-obstructive azoospermia, but it was unsuccessful. Following that, last year we performed FNA Mapping at our hospital with this patient. As a result, we were able to identify the site of spermatogenesis and freeze 10 motile spermatozoa using only a small incision in one testis. As a result of microinsemination using the first thawed frozen sperm, a pregnancy was achieved, through the first blastocyst transfer. As micro TESE is now covered by insurance, more and more medical institutions are introducing it, but since the year before last, we have been repeatedly giving lectures on FNA Mapping at the Japanese Society of Fertilization and Implantation and the Japanese Society of Reproductive Medicine, so most doctors who perform micro TESE should be aware of it by now. It seems that we have reached a stage where it is now mandatory to present FNA Mapping to patients so that it can be a choice for them before resorting to any kind of invasive surgery.
