title: Changes in uterine and ovarian arterial impedance during the periovulatory period in conception and nonconception cycles.
abstract: OBJECTIVE
  To evaluate whether the Doppler velocimetry of uterine and ovarian arteries during the periovulatory period in conception cycles differs from that in nonconception cycles.
  
  
  METHODS
  Transvaginal color Doppler sonography was used to assess uterine and ovarian perfusion in 63 infertile women during the periovulatory period.
  
  
  RESULTS
  In the conception cycles (n = 16), the PI values of uterine arteries at the day of ovulation were significantly less than those in nonconception cycles (n = 47). There were no significant differences in the PI values of ovarian arteries between the conception and nonconception cycles.
  
  
  CONCLUSIONS
  In the present study, the conception cycles showed lower vascular impedance in the uterine during the periovulatory period than did the nonconception cycles. This endometrial perfusion presents an accurate noninvasive assay of uterine receptivity that can be used to predict the successful outcome of implantation and to reveal unexplained infertility problems.
authors.affiliation: Department of Obstetrics and Gynecology, Tama Nagayama Hospital, Nippon Medical School, Tokyo, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Yokota
authors.forename: A
authors.initials: A
authors.lastname: Nakai
authors.forename: A
authors.initials: A
authors.lastname: Oya
authors.forename: T
authors.initials: T
authors.lastname: Koshino
authors.forename: T
authors.initials: T
authors.lastname: Araki
mesh_terms: D000328:Adult; D001158:Arteries; D001783:Blood Flow Velocity; D002996:Clomiphene / Q000627:therapeutic use; D005260:Female; D005306:Fertilization; D006801:Humans; D007247:Infertility, Female / Q000503:physiopathology / Q000628:therapy; D010053:Ovary / Q000098:blood supply* / Q000000981:diagnostic imaging; D010060:Ovulation; D011247:Pregnancy; D011673:Pulsatile Flow; D018615:Ultrasonography, Doppler, Color; D014599:Uterus / Q000098:blood supply* / Q000000981:diagnostic imaging
chemical_list: D002996:Clomiphene