title: A modest increase in serum progesterone levels on the day of human chorionic gonadotropin (hCG) administration may influence pregnancy rate and pregnancy loss in in vitro fertilization-embryo transfer (IVF-ET) patients.
abstract: OBJECTIVE
  Our purpose was to study the effect of a modest increase in preovulatory serum progesterone (P4) levels in hyperstimulated patients and its association with pregnancy rate and pregnancy loss following in vitro fertilization (IVF) and embryo transfer (ET).
  
  
  METHODS
  Only patients with mechanical factor and three transferred embryos were included in the present study. They were divided into two groups according to two critical breakpoints for P4 serum levels on the day of hCG administration: serum P4 below 0.6 ng/ml in 28 cycles (group I) and > 0.6 ng/ml in 80 cycles (group II).
  
  
  METHODS
  The setting was the IVF program at Carmel Medical Center, Haifa, Israel.
  
  
  RESULTS
  The pregnancy rate per embryo transfer was 53% (15/28) in group I and 10% (8/80) in group II (P < 0.025). Of 15 pregnancies achieved in group I, 14 were ongoing pregnancies, compared to 4 of 8 ongoing pregnancies in group II (P < 0.03).
  
  
  CONCLUSIONS
  Our findings suggest that a very modest increase in serum P4 levels on the day of hCG administration is associated with lower pregnancy and ongoing pregnancy rates in IVF-ET.
authors.affiliation: Department of Obstetrics and Gynecology, Carmel Medical Center, Haifa, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Dirnfeld
authors.forename: S
authors.initials: S
authors.lastname: Goldman
authors.forename: Y
authors.initials: Y
authors.lastname: Gonen
authors.forename: M
authors.initials: M
authors.lastname: Koifman
authors.forename: A
authors.initials: A
authors.lastname: Lissak
authors.forename: H
authors.initials: H
authors.lastname: Abramovici
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000008:administration & dosage*; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D011374:Progesterone / Q000097:blood*
chemical_list: D006063:Chorionic Gonadotropin; D011374:Progesterone