Fertilization and early embryology: Ongoing pregnancies and birth after intracytoplasmic sperm injection with frozen—thawed epididymal spermatozoa

Abstract excerpt

In seven patients who did not become pregnant following microsurgical epididymal sperm aspiration (MESA) and intracytoplasmic sperm injection (ICSI), a subsequent ICSI was performed using previously cryopreserved super-numerary epididymal spermatozoa without re-operating on the husband. During the original MESA procedure a mean sperm concentration of 12.3 x 10(6)/ml was achieved. The supernumerary spermatozoa...