title: Scratching and IVF: any role?
abstract: To review updated information on the influence of endometrial scratching on IVF.
  
  
  
  Endometrial receptivity remains an important rate-limiting step affecting the success of IVF. The current evidence on the effect of endometrial scratching on IVF ranges from marked improvement, no difference to a potentially negative impact. The heterogeneity of studies presents a challenge in interpretation of data for routine clinical practice.
  
  
  
  Endometrial scratching performed in the preceding cycle is associated with improved clinical pregnancy and live birth rates in women with recurrent implantation failure, but not in unselected subfertile women undergoing IVF. Most of the current literature are underpowered and at high risk of bias.
authors.affiliation: Department of Obstetrics and Gynaecology, The University of Hong Kong, Hong Kong.
authors.forename: Jennifer Ka Yee
authors.initials: JK
authors.lastname: Ko
authors.forename: Ernest Hung Yu
authors.initials: EH
authors.lastname: Ng
mesh_terms: D001723:Birth Rate; D010064:Embryo Implantation; D004624:Embryo Transfer; D004717:Endometrium / Q000601:surgery*; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D015907:Hysteroscopy; D007246:Infertility; D007247:Infertility, Female / Q000628:therapy*; D011247:Pregnancy; D011256:Pregnancy Outcome; D018873:Pregnancy Rate