title: Assessment of human oocyte developmental competence by cumulus cell morphology and circulating hormone profile.
abstract: The predictive value of the morphology of the cumulus--oocyte complex (COC) has not yet been explored as a possible factor contributing to the success of human in-vitro maturation (IVM). In the present study, development-supporting competency of oocytes encircled in a large ( > or = 5) (grade A), moderate (3 approximately 4) (grade B) or small ( < or = 2) (grade C) number of cumulus cell layers was assessed, together with changes in hormonal profile following a truncated course of 150 IU pure FSH administration for 3 days prior to aspiration on laparoscopy indicated for endometriosis. FSH priming increased the number of COC aspirated without changing the proportion of the three morphological types of COC, which were then subjected to IVM in the presence of 200 mIU/ml FSH plus 1000 mIU/ml human chorionic gonadotrophin, followed by intracytoplasmic sperm injection. The highest development-supporting competence was observed not with oocytes in grade A COC harvested from natural cycles, but with oocytes in grade B COC from FSH-primed cycles. Hormonal profiles in patients bearing grade B COC were characterized by moderate response in oestradiol and progesterone production following FSH, with LH/FSH ratio being below 1.0. It is concluded that an optimal window of hormonal profile(s) may exist for follicle aspiration to obtain grade B COC in FSH-stimulated human IVM cycles.
authors.affiliation: St Luke Clinic, 5 Tsumori-Tomioka, Oita 870-047, Japan.
authors.forename: Chikako
authors.initials: C
authors.lastname: Sato
authors.forename: Masayuki
authors.initials: M
authors.lastname: Shimada
authors.forename: Takahide
authors.initials: T
authors.lastname: Mori
authors.forename: Youko
authors.initials: Y
authors.lastname: Kumasako
authors.forename: Eiko
authors.initials: E
authors.lastname: Otsu
authors.forename: Hirohiko
authors.initials: H
authors.lastname: Watanabe
authors.forename: Takafumi
authors.initials: T
authors.lastname: Utsunomiya
mesh_terms: D018929:Cell Culture Techniques; D004967:Estrogens / Q000097:blood*; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood* / Q000494:pharmacology; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood*; D009865:Oocytes / Q000166:cytology* / Q000187:drug effects / Q000254:growth & development; D011374:Progesterone / Q000097:blood*
chemical_list: D004967:Estrogens; D011374:Progesterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone