title: Endometrial evaluation by aspiration biopsy on the day of oocyte retrieval in the embryo transfer cycles in patients with serum progesterone rise during the follicular phase.
abstract: OBJECTIVE
  To investigate the effect of subtle serum P rise before hCG administration on endometrial maturation in stimulated cycles.
  
  
  METHODS
  Case-control study.
  
  
  METHODS
  Tertiary referral center.
  
  
  METHODS
  Twenty patients with serum P < or = 0.9 ng/mL (group I) (conversion to SI unit, 3.180), 20 patients with premature P rise (> or = 1.1 ng/mL, group II), and 20 patients with normal serum P (group III).
  
  
  METHODS
  Patients in groups I and II underwent endometrial aspiration biopsies on the day of oocyte retrieval in the ET cycles themselves. Patients in group III, without endometrial biopsies, were chosen as controls.
  
  
  METHODS
  Comparison of endometrial maturation, correlation between endometrial dating and cumulative P exposure, and/or number of days of P > or = 1.1 ng/mL and comparison of clinical outcome.
  
  
  RESULTS
  Groups I and II showed a secretory activity of the endometrium. In group II, the endometrial dating correlated neither with P exposure nor with the number of days of subtle P rise. Clinical pregnancies were observed in both groups but none in cases with endometrium advanced > 3 days. Similar pregnancy and implantation rates were observed between groups I and III.
  
  
  CONCLUSIONS
  These data suggest that an endometrial aspiration biopsy performed on the day of oocyte retrieval may be used to assess endometrial receptivity in patients with serum P rise.
authors.affiliation: Centre for Reproductive Medicine, Dutch-speaking Brussels Free University, Brussels, Belgium.
authors.forename: F
authors.initials: F
authors.lastname: Ubaldi
authors.forename: C
authors.initials: C
authors.lastname: Bourgain
authors.forename: H
authors.initials: H
authors.lastname: Tournaye
authors.forename: J
authors.initials: J
authors.lastname: Smitz
authors.forename: A
authors.initials: A
authors.lastname: Van Steirteghem
authors.forename: P
authors.initials: P
authors.lastname: Devroey
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology; D000328:Adult; D001707:Biopsy, Needle; D016022:Case-Control Studies; D006063:Chorionic Gonadotropin / Q000627:therapeutic use; D010064:Embryo Implantation; D004624:Embryo Transfer; D004717:Endometrium / Q000166:cytology* / Q000473:pathology; D005260:Female; D005498:Follicular Phase; D006801:Humans; D010062:Ovulation Induction; D011247:Pregnancy; D011256:Pregnancy Outcome; D011374:Progesterone / Q000097:blood*
chemical_list: D006063:Chorionic Gonadotropin; D011374:Progesterone