title: Relation between endometrial wavelike activity and fecundability in spontaneous cycles.
abstract: OBJECTIVE
  To determine whether endometrial activity is related to the occurrence of pregnancy in spontaneous menstrual cycles.
  
  
  METHODS
  Prospective observational ultrasound evaluation of endometrial activity during fertility screening cycles.
  
  
  METHODS
  University hospital-based infertility clinic.
  
  
  METHODS
  Fifty-nine fertility screening cycles (ultrasound monitoring of follicle growth and ovulation, postcoital test, semen analysis, midluteal P, Chlamydia antibody determination, and tubal patency testing) were performed in 47 couples complaining of infertility. In 33 couples (37 cycles), no fertility impairing factors were found. Endometrial activity was analyzed in these cycles.
  
  
  METHODS
  Ultrasound examination was performed transvaginally throughout the cycle.
  
  
  METHODS
  Endometrial activity, wave pattern, pregnancy.
  
  
  RESULTS
  Nine women conceived within the cycle studied. Conception cycles showed less-activity compared with nonconception cycles. Endometrial wavelike activity increased throughout the follicular phase and decreased after ovulation in conception and nonconception cycles.
  
  
  CONCLUSIONS
  Endometrial activity is related to fecundability in a spontaneous cycle.
authors.affiliation: Academisch Ziekenhuis Maastricht, The Netherlands.
authors.forename: M M
authors.initials: MM
authors.lastname: IJland
authors.forename: J L
authors.initials: JL
authors.lastname: Evers
authors.forename: G A
authors.initials: GA
authors.lastname: Dunselman
authors.forename: L
authors.initials: L
authors.lastname: Volovics
authors.forename: H J
authors.initials: HJ
authors.lastname: Hoogland
mesh_terms: D000858:Anovulation; D002690:Chlamydia Infections / Q000175:diagnosis / Q000453:epidemiology; D004717:Endometrium / Q000000981:diagnostic imaging / Q000502:physiology / Q000503:physiopathology*; D005187:Fallopian Tubes / Q000502:physiology / Q000503:physiopathology; D005260:Female; D005298:Fertility / Q000502:physiology*; D006801:Humans; D007247:Infertility, Female / Q000000981:diagnostic imaging / Q000503:physiopathology*; D007248:Infertility, Male; D008297:Male; D008597:Menstrual Cycle; D010060:Ovulation; D011247:Pregnancy; D012661:Semen / Q000166:cytology; D014463:Ultrasonography; D014621:Vagina