title: Antral follicle count in clinical practice: analyzing clinical relevance.
abstract: OBJECTIVE
  To determine the clinical relevance of obtaining antral follicle counts (AFC) before ovarian stimulation in an IVF program.
  
  
  METHODS
  Retrospective cohort study.
  
  
  METHODS
  An IVF program in a large academic teaching hospital.
  
  
  METHODS
  A total of 1,049 stimulated IVF cycles in 734 subjects between September 2003 and December 2007 selected from our program's database.
  
  
  METHODS
  Basal antral follicles (AFCs) (3 mm-10 mm) were counted via ultrasound scan on cycle day 3 in luteal leuprolide acetate stimulations, or after at least 2 weeks of oral contraceptives in microdose leuprolide acetate stimulations. Patients were grouped according to basal AFC, and outcome parameters compared for AFC groups within each stimulation protocol.
  
  
  METHODS
  Oocytes retrieved, ovarian response, implantation rate, cancellations, pregnancy, pregnancy loss, and live births per cycle start.
  
  
  RESULTS
  Antral follicle count grouping is predictive of threefold change in ovarian response to gonadotropins and oocytes retrieved. Low AFC did predict a higher cancellation rate. Antral follicle count did not predict implantation rate, pregnancy rate, or live birth rate per cycle start.
  
  
  CONCLUSIONS
  Antral follicle count may be helpful in determining stimulation protocol, as it is the most reliable determinant of oocytes retrieved per starting FSH dose. Antral follicle count predicts ovarian response, not embryo quality or pregnancy.
authors.affiliation: Division of Reproductive Endocrinology, Department of Obstetrics and Gynecology, Baystate Medical Center, Western Campus of Tufts University School of Medicine, Springfield, Massachusetts 01199, USA.
authors.forename: Albert
authors.initials: A
authors.lastname: Hsu
authors.forename: Margaret
authors.initials: M
authors.lastname: Arny
authors.forename: Alexander B
authors.initials: AB
authors.lastname: Knee
authors.forename: Carrie
authors.initials: C
authors.lastname: Bell
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Cook
authors.forename: Amy L
authors.initials: AL
authors.lastname: Novak
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Grow
mesh_terms: D000328:Adult; D002452:Cell Count / Q000379:methods; D015331:Cohort Studies; D003944:Diagnostic Techniques, Obstetrical and Gynecological; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods; D006801:Humans; D007246:Infertility / Q000175:diagnosis / Q000473:pathology / Q000628:therapy; D006080:Ovarian Follicle / Q000166:cytology* / Q000000981:diagnostic imaging / Q000473:pathology; D010062:Ovulation Induction / Q000379:methods; D011247:Pregnancy; D018873:Pregnancy Rate; D011364:Professional Practice; D011379:Prognosis; D012189:Retrospective Studies; D014463:Ultrasonography