title: IVF/ICSI outcomes between cycles with luteal estradiol (E2) pre-treatment before GnRH antagonist protocol and standard long GnRH agonist protocol: a prospective and randomized study.
abstract: OBJECTIVE
  To study if luteal E(2) pre-treatment before GnRH antagonist protocol improves IVF/ICSI outcomes compared with standard long GnRH agonist protocol.
  
  
  METHODS
  A prospective, randomized and controlled study.
  
  
  METHODS
  ART center of a state public hospital
  
  
  METHODS
  Two hundred twenty infertile women underwent IVF/ICSI treatments.
  
  
  METHODS
  Participants received oral Estradiol Valerate 4 mg/day preceding the IVF cycle from day 21 until day 2 of next cycle before GnRH antagonist protocol (E(2) pre-treatment group n=109) or received standard long GnRH agonist protocol as control group (n=111).
  
  
  METHODS
  Number of oocytes collected, MII oocytes, fertilization, implantation, live birth and early pregnancy rate, and hormone profiles.
  
  
  RESULTS
  E(2) pre-treatment exerted a significant suppressive effect on FSH but not LH secretion compared with basal FSH and LH levels. In E(2) pre-treatment group serum LH level was significantly higher during COH and serum P was also significantly higher on the day of HCG injection compared with control group. Five patients from E(2) pre-treatment group had elevated LH at all time (>or= 10 IU/L) and also a concomitantly high P (>1 ng/mL). Two of the five women achieved pregnancy but had early pregnancy loss. Overall, IVF/ICSI outcomes such as implantation, clinical pregnancy and live birth rates were similar between E(2) pre-treatment and control groups.
  
  
  CONCLUSIONS
  Luteal E(2) pre-treatment before GnRH antagonist protocol significantly increases serum LH level and incidence rate of premature LH but no significant effect is observed on implantation, clinical pregnancy, live birth and early pregnancy loss rates compared with long GnRH agonist protocol. However, more studies in large numbers of cycles are needed to confirm that increased serum LH level by E(2) pre-treatment during COH has no negative effect on the IVF/ICSI outcomes.
authors.affiliation: Chongqing Reproductive and Genetic Institute, Chongqing Obstetric and Gynecology Hospital, 64 Jingtang St., Yuzhong District, Chongqing 400013, China. yehong1210@163.com
authors.forename: Hong
authors.initials: H
authors.lastname: Ye
authors.forename: Guo-ning
authors.initials: GN
authors.lastname: Huang
authors.forename: Ping-hong
authors.initials: PH
authors.lastname: Zeng
authors.forename: Li
authors.initials: L
authors.lastname: Pei
mesh_terms: D000328:Adult; D002985:Clinical Protocols; D004334:Drug Administration Schedule; D004958:Estradiol / Q000008:administration & dosage* / Q000097:blood; D004967:Estrogens / Q000008:administration & dosage / Q000097:blood; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D005640:Follicle Stimulating Hormone / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000819:agonists / Q000037:antagonists & inhibitors; D006801:Humans; D007247:Infertility, Female / Q000097:blood / Q000628:therapy*; D008183:Luteal Phase; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D010062:Ovulation Induction / Q000379:methods; D011247:Pregnancy; D018873:Pregnancy Rate; D011446:Prospective Studies; D016896:Treatment Outcome
chemical_list: D004967:Estrogens; D007987:Gonadotropin-Releasing Hormone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone