Successful pregnancy after oocyte activation by a calcium ionophore for a patient with recurrent intracytoplasmic sperm injection failure, with an assessment of oocyte activation and sperm centrosomal function using bovine eggs

Yukihiro Terada, Hisataka Hasegawa, Aiko Takahashi, Tomohisa Ugajin, Nobuo Yaegashi, Kunihiro Okamura

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Objective: To report a successful pregnancy after intracytoplasmic sperm injection (ICSI) with artificial oocyte activation (AOA) on a patient whose fertilization rate after ICSI was extremely low; and to report on cytologic analyses of the fertilization failure (FF) eggs after ICSI and a biologic assessment of the sperm of this patient. Design: Case report with an assessment of gamete function. Setting: University hospital and an experimental laboratory. Patient(s): A couple with severe oligoasthenozoospermia, whose seventh attempt at ICSI ended in the failure. Intervention(s): Cytologic analyses of FF eggs after ICSI, AOA after ICSI, and analyses of human sperm oocyte activation ability and centrosomal function. Result(s): Fertilization arrest after ICSI was observed in FF eggs at various stages of fertilization. After artificial oocyte activation by exposure to ionomycin, clinical pregnancy was confirmed, and a healthy baby was born. As assessed by heterologous ICSI of human sperm into bovine oocytes, there was no significant difference in the oocyte activation rates between the patient's and control sperm, but the sperm centrosomal function was low in the patient's sperm (48.5% vs. 69.6%). Conclusion(s): We report a successful pregnancy after ICSI with AOA using a calcium ionophore, after critical cytologic analyses of the FF eggs. Furthermore, sperm centrosomal function was low, indicating that sperm's ability to process the events of fertilization after the oocyte activation was poor in this patient.

Original languageEnglish
Pages (from-to)935.e11-935.e14
JournalFertility and sterility
Volume91
Issue number3
DOIs
Publication statusPublished - 2009 Mar

Keywords

  • ICSI
  • artificial oocyte activation
  • cytologic analyses
  • sperm centrosome

ASJC Scopus subject areas

  • Reproductive Medicine
  • Obstetrics and Gynaecology

Fingerprint Dive into the research topics of 'Successful pregnancy after oocyte activation by a calcium ionophore for a patient with recurrent intracytoplasmic sperm injection failure, with an assessment of oocyte activation and sperm centrosomal function using bovine eggs'. Together they form a unique fingerprint.

Cite this