Analysis of limited fertility in intracytoplasmic sperm injection of sperm obtained by electroejaculation.

We correlated findings in semen from patients with ejaculatory dysfunction with results of fertilization using their electroejaculated sperm. Electroejaculation was carried out in six patients with the above-mentioned criteria for a total of eight times. Sperm was obtained in six attempts. Intracytoplasmic injection of these sperm was performed in 156 eggs. Sixty-seven eggs were fertilized; most of these were injected with motile sperm. Two women became pregnant, both after injection with motile sperm. As previously reported, electroejaculated sperm showed low motility and a low fertilization rate, but even motile sperm had a low fertilization rate. The results of the present study suggest the importance in fertilization of undetermined factors in addition to sperm motility. (Reprod Med Biol 2004; : 9-12).