title: The effect of mid-luteal estradiol level on the outcome of ICSI-ET cycles.
abstract: METHODS
  We investigated if mid-luteal estradiol levels could predict the outcome in intracytoplasmic sperm injection embryo transfer (ICSI-ET) cycles ( n=231). Pregnant and non-pregnant women were compared regarding their peak estradiol levels on human chorionic gonadotropin (hCG) injection day, and mid-luteal estradiol levels on the 7th day following oocyte recovery. Pregnancy rates of the groups that were designed according to the "peak/mid-luteal estradiol level" and the mid-luteal estradiol levels were also compared.
  
  
  RESULTS
  Peak and mid-luteal estradiol levels in pregnant women were higher than in non-pregnant women in all patients, although the difference between peak and mid-luteal estradiol levels were similar in pregnant and non-pregnants. Pregnant women had higher mid-luteal estradiol levels in good responders, but the peak estradiol levels of pregnant and non-pregnant women were similar. In poor responders, pregnant and non-pregnant women were similar with respect to peak and mid-luteal estradiol levels. Both in all patients and good responders, women with mid-luteal estradiol levels <200 pg/ml had lower pregnancy rates than those with >2000 pg/ml. Peak/mid-luteal estradiol ratios of pregnant and non-pregnant women were not significantly different in all patients, good responders and poor responders; although a tendency for a lower ratio in pregnants was encountered in good responders. Pregnancy rates of the groups according to the "peak/mid-luteal estradiol ratio" were similar; in all patients, good responders and poor responders.
  
  
  CONCLUSIONS
  A relation between the mid-luteal estradiol level and the outcome is encountered only in good responders.
authors.affiliation: IVF Department, Ozel Ege Tup Bebek Merkezi, 1418 sokak No: 10, 35230, Kahramanlar-Izmir, Turkey. eaktan@yahoo.com
authors.forename: Erdal
authors.initials: E
authors.lastname: Aktan
authors.forename: Kaan
authors.initials: K
authors.lastname: Bozkurt
authors.forename: Dilek
authors.initials: D
authors.lastname: Ozer
authors.forename: Sait
authors.initials: S
authors.lastname: Yucebilgin
authors.forename: Nedim
authors.initials: N
authors.lastname: Karadadas
authors.forename: Onur
authors.initials: O
authors.lastname: Bilgin
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D004624:Embryo Transfer; D004958:Estradiol / Q000097:blood*; D005260:Female; D006801:Humans; D008183:Luteal Phase / Q000097:blood*; D008297:Male; D011237:Predictive Value of Tests; D011247:Pregnancy; D018873:Pregnancy Rate; D020554:Sperm Injections, Intracytoplasmic
chemical_list: D015415:Biomarkers; D004958:Estradiol