title: Abdominal ultrasound-guided embryo transfer improves clinical pregnancy rates after in vitro fertilization: experiences from 330 clinical investigations.
abstract: OBJECTIVE
  To investigate the effect of ultrasound-guided embryo transfer on the rate of implantation and clinical pregnancy.
  
  
  METHODS
  A prospective randomized trial was performed to compare ultrasound-guided embryo transfer with the traditional method. A total of 330 patients were randomly divided into two groups on the day of embryo transfer. For the cases (n = 178), ultrasound-guided was used; controls (n = 152) was performed using routine methods.
  
  
  RESULTS
  The rate of implantation and clinical pregnancy for the cases (19.6 and 37.1%, respectively) was significantly higher than for the controls (12.6 and 25%, respectively; p < 0.05).
  
  
  CONCLUSIONS
  Ultrasound-guided embryo transfer can significantly increase the rate of implantation and clinical pregnancy, and should be recommended as a routine procedure in the process of in vitro fertilization and embryo transfer (IVF-ET).
authors.affiliation: Center of Reproductive Medicine, Shenzhen Hospital, Peking University, Shenzhen 518036, PR China.
authors.forename: Rong
authors.initials: R
authors.lastname: Li
authors.forename: Lihua
authors.initials: L
authors.lastname: Lu
authors.forename: Guiqin
authors.initials: G
authors.lastname: Hao
authors.forename: Kai
authors.initials: K
authors.lastname: Zhong
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Cai
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging; D000328:Adult; D010064:Embryo Implantation; D004624:Embryo Transfer; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy; D018873:Pregnancy Rate; D011446:Prospective Studies; D020554:Sperm Injections, Intracytoplasmic; D014463:Ultrasonography / Q000379:methods*