title: [Effect of trial transfer on embryo transfer techniques].
abstract: OBJECTIVE
  To evaluate the effect of trial transfer on embryo transfer.
  
  
  METHODS
  Embryo transfer guided by ultrasound was performed in 114 cycles. And trial transfer was accomplished in 101 of them prior to embryo transfer. The clinical pregnancy rate and embryo implantation rate were compared between the group with trial transfer and the group without, and also among the sub-groups formed according to the difference between the trial transfer position and the actual embryo depth.
  
  
  RESULTS
  There was no statistically significant difference in the clinical pregnancy rate and embryo implantation rate between the group with trial transfer and that without trial transfer(59.41% vs 61.54%, 35.81% vs 31.43%, P > 0.05), nor was there between the two subgroups of the group with trial transfer (61.54% vs 58.67%, 40.79% vs 34.09%, P > 0.05).
  
  
  CONCLUSIONS
  As far as modern embryo transfer techniques are concerned, trial transfer can not provide accurate guidance for the depth of embryo transfer.
authors.affiliation: Reproductive Medicine Center, Drum Tower Hospital, Nanjing University Medical College Nanjing, Jiangsu 210008, China.
authors.forename: Hai-Xiang
authors.initials: HX
authors.lastname: Sun
authors.forename: Ya-Li
authors.initials: YL
authors.lastname: Hu
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Ning-Yuan
authors.initials: NY
authors.lastname: Zhang
authors.forename: Zheng-Feng
authors.initials: ZF
authors.lastname: Xu
authors.forename: Hui-Yan
authors.initials: HY
authors.lastname: Wang
mesh_terms: D000328:Adult; D004624:Embryo Transfer; D004717:Endometrium / Q000000981:diagnostic imaging; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D014463:Ultrasonography