title: Characteristics of progesterone changes in women with subtle progesterone rise in recombinant follicle-stimulating hormone and gonadotropin-releasing hormone antagonist cycle.
abstract: BACKGROUND
  To assess the characteristics of progesterone (Prog) changes in women with a subtle Prog rise in recombinant follicle-stimulating hormone (r-FSH) and GnRH antagonist cycles.
  
  
  METHODS
  We enrolled 233 patients undergoing controlled ovarian hyperstimulation with r-FSH and GnRH antagonist for IVF or ICSI. A subtle Prog rise 1 day before hCG administration was defined as a Prog value of > or =1.2 ng/ml.
  
  
  RESULTS
  100 of 233 cycles (42.9%) showed a subtle Prog rise in this study. The mean serum Prog levels and area under curve (AUC) in the group with Prog > or =1.2 ng/ml was significantly higher than that in the Prog <1.2 ng/ml group on cycle day 8 (1.17 +/- 0.4 and 0.80 +/- 0.3 ng/ml, respectively, for Prog level, p = 0.003; 571 +/- 123 and 763 +/- 250 for AUC, p = 0.001), and remained significantly higher until the day of hCG administration. Moreover, 55% of the patients on cycle day 9, 65% on cycle day 10, 75% on cycle day 11 and 85% on cycle day 12 in the Prog > or =1.2 ng/ml group have a serum Prog level of > or =1.2 ng/ml.
  
  
  CONCLUSIONS
  A subtle Prog rise may occur as early as cycle day 8 in r-FSH/GnRH antagonist cycles.
authors.affiliation: Department of Obstetrics and Gynecology, Shin Kong Wu Ho-Su Memorial Hospital, No. 95, Wen Chang Road, Taipei, Taiwan.
authors.forename: Kok-Min
authors.initials: KM
authors.lastname: Seow
authors.forename: Yu-Hung
authors.initials: YH
authors.lastname: Lin
authors.forename: Bih-Chwen
authors.initials: BC
authors.lastname: Hsieh
authors.forename: Lee-Wen
authors.initials: LW
authors.lastname: Huang
authors.forename: Shih-Chia
authors.initials: SC
authors.lastname: Huang
authors.forename: Chin-Yu
authors.initials: CY
authors.lastname: Chen
authors.forename: Pei-Hsin
authors.initials: PH
authors.lastname: Chen
authors.forename: Chii-Ruey
authors.initials: CR
authors.lastname: Tzeng
authors.forename: Jiann-Loung
authors.initials: JL
authors.lastname: Hwang
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000008:administration & dosage; D004958:Estradiol / Q000097:blood; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage*; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000037:antagonists & inhibitors; D006727:Hormone Antagonists / Q000008:administration & dosage; D006801:Humans; D007247:Infertility, Female / Q000097:blood / Q000188:drug therapy*; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D011256:Pregnancy Outcome; D011374:Progesterone / Q000097:blood*; D011994:Recombinant Proteins / Q000008:administration & dosage; D055815:Young Adult
chemical_list: D006063:Chorionic Gonadotropin; D006727:Hormone Antagonists; D011994:Recombinant Proteins; D007987:Gonadotropin-Releasing Hormone; D011374:Progesterone; D004958:Estradiol; D005640:Follicle Stimulating Hormone; C062876:cetrorelix