title: Neither sildenafil nor vaginal estradiol improves endometrial thickness in women with thin endometria after taking oral estradiol in graduating dosages.
abstract: OBJECTIVE
  To determine if sildenafil improves endometrial thickness better than vaginal estradiol (E2) in women with a history of thin endometria.
  
  
  METHODS
  Women failing to attain an 8 mm endometrial thickness on either the oocyte retrieval cycle or their first frozen embryo transfer (ET) despite an oral graduated E2 regimen were treated again with graduated oral E2 and were also randomly assigned to vaginal sildenafil or vaginal E2 therapy. Endometrial thickness was compared between the groups.
  
  
  RESULTS
  Neither vaginal E2 nor sildenafil significantly improved endometrial thickness or blood flow in the subsequent frozen ET-cycle.
  
  
  CONCLUSIONS
  These data fail to corroborate previous claims that 25 mg sildenafil four times daily intravaginally can improve endometrial thickness.
authors.affiliation: The University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School at Camden, Cooper/Hospital University Medical Center, USA.
authors.forename: J H
authors.initials: JH
authors.lastname: Check
authors.forename: V
authors.initials: V
authors.lastname: Graziano
authors.forename: G
authors.initials: G
authors.lastname: Lee
authors.forename: A
authors.initials: A
authors.lastname: Nazari
authors.forename: J K
authors.initials: JK
authors.lastname: Choe
authors.forename: C
authors.initials: C
authors.lastname: Dietterich
mesh_terms: D000282:Administration, Intravaginal; D000328:Adult; D001158:Arteries / Q000502:physiology; D004717:Endometrium / Q000098:blood supply* / Q000187:drug effects*; D004958:Estradiol / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007247:Infertility, Female; D010879:Piperazines / Q000008:administration & dosage / Q000627:therapeutic use*; D011446:Prospective Studies; D011673:Pulsatile Flow; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D016896:Treatment Outcome; D014665:Vasodilator Agents / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014665:Vasodilator Agents; D004958:Estradiol; D000068677:Sildenafil Citrate