title: Retrieval of zona-free immature oocytes in a woman with recurrent empty follicle syndrome: a case report.
abstract: BACKGROUND
  Different ovulation trigger methods such as gonadotropin releasing hormone-agonist (GnRH-a) and recombinant human chorionic gonadotropin (r-hCG) plus rescue oocyte retrieval might reveal oocytes in patients with recurrent empty follicle syndrome.
  
  
  METHODS
  Endogenous luteinizing hormone was triggered with a GnRH-a (Buserelin [Suprefact pro-injection, Aventis-Pharma, Turkey], 250 microg subcutaneously) in a GnRH antagonist (Cetrorelix [Cetrotide 0.25, SeronoTurkey], 0.25 mg/d, starting on day 6), down-regulated cycle. At the first scheduled retrieval, 3 cumulus-oocytecorona complexes were recovered from the left ovary. During chemical denudation with hyaluronidase, 2 of them underwent lysis. The third was a zona-free, germinalvesicle-stage oocyte after mechanical denudation. Oocyte pickup was stopped, and recombinant human chorionic gonadotropin (hCG) (250 microg subcutaneously) was injected. Five cumulus-oocyte-corona complexes were retrieved from the right ovary 24 hours after rescue with recombinant hCG. Only mechanical denudation was done, and 4 zona-free oocytes with germinal vesicle breakdown were seen. All oocytes underwent intracytoplasmic sperm injection, and none of them were fertilized.
  
  
  CONCLUSIONS
  Oocyte maturation defects should be included in etiologic mechanisms for counseling patients with empty follicle syndrome.
authors.affiliation: Department of Obstetrics and Gynecology, GATA School of Medicine, Ankara, Turkey. nkduru@gata.edu.tr
authors.forename: Namik Kemal
authors.initials: NK
authors.lastname: Duru
authors.forename: Mehmet
authors.initials: M
authors.lastname: Cincik
authors.forename: Murat
authors.initials: M
authors.lastname: Dede
authors.forename: Adnan
authors.initials: A
authors.lastname: Hasimi
authors.forename: Iskender
authors.initials: I
authors.lastname: Baser
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000008:administration & dosage; D004334:Drug Administration Schedule; D005260:Female; D005300:Fertility Agents, Female / Q000008:administration & dosage*; D043373:Follicle Stimulating Hormone, Human / Q000008:administration & dosage; D007987:Gonadotropin-Releasing Hormone / Q000819:agonists*; D006801:Humans; D007247:Infertility, Female / Q000188:drug therapy; D007986:Luteinizing Hormone / Q000008:administration & dosage; D009865:Oocytes / Q000187:drug effects; D006080:Ovarian Follicle / Q000002:abnormalities / Q000187:drug effects*; D010062:Ovulation Induction / Q000379:methods*
chemical_list: D006063:Chorionic Gonadotropin; D005300:Fertility Agents, Female; D043373:Follicle Stimulating Hormone, Human; D007987:Gonadotropin-Releasing Hormone; D007986:Luteinizing Hormone