Case report.
Private IVF clinics and a university hospital.
A 32-year-old woman and a 33-year-old man.
Testicular sperm extraction and cryopreservation, oocyte recovery and cryopreservation, intracytoplasmic sperm injection.
Assessment of fertilization and chromosomal analysis of newborn child.
Three oocytes were injected and one embryo was obtained, resulting in the birth of a normal (46,XY) boy.
Cryopreserved spermatozoa from a patient with nonmosaic Klinefelter syndrome can form normal embryos even with cryopreserved oocytes.