title: Cervical cerclage before blastocyst transfer in patients having cryopreserved embryo transfer.
abstract: OBJECTIVE
  To present two successful pregnancy results following cervical cerclage before blastocyst transfer in patients who had cryopreserved ET and in whom cervical insufficiency was diagnosed.
  
  
  METHODS
  Case report.
  
  
  METHODS
  Assisted reproduction unit in a university hospital.
  
  
  METHODS
  Two patients with infertility and cervical insufficiency. Both patients signed informed consent.
  
  
  METHODS
  Cervical cerclage before blastocyst transfer.
  
  
  METHODS
  Pregnancy and birth.
  
  
  RESULTS
  Both women achieved pregnancy after transfer of a single, high-quality blastocyst and gave birth to a healthy infant.
  
  
  CONCLUSIONS
  Cervical cerclage can be performed before blastocyst transfer in patients with cervical insufficiency who undergo cryopreserved ET. The procedure is especially relevant to patients in whom the cervical os is dilated and the distal cervical segment is short. Transfer of a single, high-quality blastocyst can result in pregnancy and birth.
authors.affiliation: Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Road, Hangzhou, People's Republic of China.
authors.forename: Xiao-Ying
authors.initials: XY
authors.lastname: Jin
authors.forename: Lin
authors.initials: L
authors.lastname: Kuang
authors.forename: Xiao-na
authors.initials: XN
authors.lastname: Lin
authors.forename: Dong
authors.initials: D
authors.lastname: Huang
authors.forename: Song-ying
authors.initials: SY
authors.lastname: Zhang
mesh_terms: D000328:Adult; D001724:Birth Weight; D001755:Blastocyst / Q000502:physiology*; D002584:Cervix Uteri / Q000473:pathology; D036861:Delivery, Obstetric; D004624:Embryo Transfer / Q000379:methods*; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D007231:Infant, Newborn; D015931:Intensive Care, Neonatal; D011247:Pregnancy; D011248:Pregnancy Complications / Q000473:pathology