title: The impact of long-term gonadotropin-releasing hormone analogue treatment on preclinical abortions in patients with severe endometriosis undergoing in vitro fertilization-embryo transfer.
abstract: OBJECTIVE
  To examine the relationship between endometriosis and preclinical abortions and to evaluate the effect of gonadotropin-releasing hormone analogue (GnRH-a) therapy on these pregnancies.
  
  
  METHODS
  Of 67 women with severe endometriosis referred to us for in vitro fertilization-embryo transfer (IVF-ET), 32 underwent ovarian stimulation for oocyte retrieval with menotropins (protocol A), whereas the other 35 were admitted for the procedure after a 6-month period of hormonal suppression with a GnRH agonist (protocol B). The clinical impact of the preclinical and clinical pregnancies in both treatment protocols were evaluated on the basis of oocyte classification and embryo quality score.
  
  
  METHODS
  All patients were treated in our IVF Unit.
  
  
  METHODS
  Clinical pregnancy was used as our main outcome measure of success.
  
  
  RESULTS
  A significantly higher number of preclinical pregnancies (P less than 0.0001) occurred in patients treated by protocol A. After GnRH-a treatment, the preclinical pregnancy rate declined significantly (P less than 0.0001), whereas the clinical pregnancy rate per cycle and per transfer rose significantly (P less than 0.0001 and P less than 0.0001, respectively). Furthermore, clinical pregnancies had a significantly better mean embryo quality score in comparison with preclinical pregnancies (P less than 0.0001).
  
  
  CONCLUSIONS
  It is concluded that combining GnRH-a therapy before IVF-ET provides an improved treatment modality for preclinical abortions and infertility associated with severe endometriosis.
authors.affiliation: Sherman Fertility Institute, Department of Obstetrics-Gynecology, Golda Meir Medical Center, (Hasharon Hospital), Petah-Tikva, Israel.
authors.forename: D
authors.initials: D
authors.lastname: Dicker
authors.forename: J A
authors.initials: JA
authors.lastname: Goldman
authors.forename: T
authors.initials: T
authors.lastname: Levy
authors.forename: D
authors.initials: D
authors.lastname: Feldberg
authors.forename: J
authors.initials: J
authors.lastname: Ashkenazi
mesh_terms: D000022:Abortion, Spontaneous; D000328:Adult; D003692:Delayed-Action Preparations; D004624:Embryo Transfer; D004715:Endometriosis / Q000188:drug therapy* / Q000503:physiopathology; D005260:Female; D005307:Fertilization in Vitro; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives* / Q000627:therapeutic use; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000188:drug therapy* / Q000503:physiopathology; D011256:Pregnancy Outcome; D017329:Triptorelin Pamoate / Q000031:analogs & derivatives*
chemical_list: D003692:Delayed-Action Preparations; D017329:Triptorelin Pamoate; D007987:Gonadotropin-Releasing Hormone; C019176:Tryptal