Results of direct current electrical activation of failed-to-fertilize oocytes after intracytoplasmic sperm injection.

Objective: To assess the embryo formation rate after electrical activation on failed-to-fertilize oocytes after intracytoplasmic sperm injection (ICSI).

Study Design: A prospective, randomized, experimental study was conducted in our research laboratory at the Reproductive Medicine Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, Chulalongkorn University, between January and September 2004. One hundred failed-to-fertilize oocytes after ICSI were randomly assigned by stratified allocation according to oocyte grading before ICSI.

Correlation between human follicular diameter and oocyte recovery, metaphase II oocytes and fertilization rate in intracytoplasmic sperm injection programs.

This prospective study was undertaken to establish the correlation between the follicular diameter, oocyte recovery, metaphase II (MII) oocyte, and fertilization rate in intracytoplasmic sperm injection (ICSI) programs. Thirty one patients undergoing 31 ICSI cycles from August 1998 to January 1999 at King Chulalongkorn Memorial Hospital were studied. The patients were stimulated with either short or long GnRHa portocol.