Electrical activation of oocytes after intracytoplasmic sperm injection: a controlled randomized study.

Objective: To evaluate the electrical activation of oocytes in patients with previously failed or limited fertilization after intracytoplasmic sperm injection (ICSI) and in patients with possible failure of fertilization.

Design: Prospective randomized study.

Setting: A private IVF center in Egypt.

The impact of spermatozoa preincubation time and spontaneous acrosome reaction in intracytoplasmic sperm injection: a controlled randomized study.

Objective: To determine the optimum time interval between semen processing and incubation before intracytoplasmic sperm injection (ICSI) and correlate it with the acrosomal reaction rate.

Design: Controlled randomized study.

Setting: The Egyptian IVF-ET Center.

Intracytoplasmic spermatid injection can result in the delivery of normal offspring.

Almost one-third of all patients with nonobstructive azoospermia undergoing testicular sperm extraction (TESE) and intracytoplasmic sperm injection (ICSI) have cancelled cycles due to failure to find spermatozoa. For these patients, every attempt should be made to rescue the cycles by searching for spermatids. In this retrospective study, we report our experience in using elongating (stage Sb2) and elongated (stage Sc and Sd1) spermatids for ICSI.