title: Pilot study evaluating a progesterone vaginal ring for luteal-phase replacement in donor oocyte recipients.
abstract: OBJECTIVE
  To evaluate the proportions of women demonstrating adequate endometrial transformation during a mock cycle and the 8-week clinical pregnancy rate in a donor oocyte cycle using a P vaginal ring or P vaginal gel.
  
  
  METHODS
  Prospective, controlled, randomized trial.
  
  
  METHODS
  Donor egg program at an academic center.
  
  
  METHODS
  Women who are candidates for donor oocytes.
  
  
  METHODS
  Subjects were analyzed for adequate endometrial transformation after suppression and pretreatment with E(2). Subjects were treated with 18 days of E(2) coupled with a weekly P vaginal ring or 90 mg 8% vaginal gel twice daily. Endometrial biopsies were performed on cycle day 25 or 26. Nine subjects successfully completing the mock cycle participated in an ET cycle using the same randomly assigned study medication.
  
  
  METHODS
  Adequate endometrial transformation, pregnancy, safety, and tolerability of the vaginal ring.
  
  
  RESULTS
  Twenty women randomized 1:1 to either the P vaginal ring or vaginal gel completed the mock cycle. Endometrial histology was "in phase" for 8 of 10 (80%) in the vaginal ring group and 10 of 10 (100%) in the gel group. For the women who participated in the ET cycle, clinical pregnancies and live births were observed in 4 of 5 (80%) in the vaginal ring group and 1 of 4 (25%) in the vaginal gel group.
  
  
  CONCLUSIONS
  In women requiring luteal-phase replacement, the P vaginal ring was able to adequately transform the endometrium and was comparable to the P vaginal gel in efficacy and safety, while offering the advantage of weekly rather than multiple daily doses.
authors.affiliation: Jones Institute for Reproductive Medicine, Eastern Virginia Medical School, Norfolk, Virginia, USA. StadtmLA@evms.edu
authors.forename: Laurel
authors.initials: L
authors.lastname: Stadtmauer
authors.forename: Diane D
authors.initials: DD
authors.lastname: Harrison
authors.forename: Jeannine
authors.initials: J
authors.lastname: Boyd
authors.forename: Silvina
authors.initials: S
authors.lastname: Bocca
authors.forename: Sergio
authors.initials: S
authors.lastname: Oehninger
mesh_terms: D000282:Administration, Intravaginal; D000328:Adult; D003274:Contraceptive Devices, Female; D004624:Embryo Transfer / Q000379:methods*; D005260:Female; D005300:Fertility Agents, Female / Q000008:administration & dosage; D020249:Hormone Replacement Therapy; D006801:Humans; D007246:Infertility / Q000628:therapy; D008183:Luteal Phase / Q000187:drug effects*; D008875:Middle Aged; D018587:Oocyte Donation; D010865:Pilot Projects; D011247:Pregnancy; D018873:Pregnancy Rate; D011374:Progesterone / Q000008:administration & dosage*; D014180:Transplantation
chemical_list: D005300:Fertility Agents, Female; D011374:Progesterone