title: Monozygotic triplet pregnancy following egg donation and transfer of single frozen-thawed embryo.
abstract: OBJECTIVE
  To describe a case of monozygotic triplet pregnancy following egg donation and the transfer of a single frozen-thawed embryo.
  
  
  METHODS
  Case report.
  
  
  METHODS
  District general hospital and regional department of fetal medicine in northeast England.
  
  
  METHODS
  A 38-year-old woman with a 2-year history of primary infertility due to severe endometriosis and poor ovarian reserve who conceived after egg donation and transfer of a single frozen-thawed embryo.
  
  
  METHODS
  Transfer of a single frozen-thawed embryo and delivery of three identical female infants by emergency caesarean section because of preterm labor at 32 weeks' gestation.
  
  
  METHODS
  Review of effect of assisted conception on monozygotic twinning rates.
  
  
  RESULTS
  Healthy outcome for all three infants.
  
  
  CONCLUSIONS
  Assisted reproductive treatments may lead to disturbances in zona pellucida architecture and an increase in monozygotic twinning rates. Couples need to be informed of this and the increased risks associated with these pregnancies before they begin with treatment.
authors.affiliation: Centre for Assisted Reproduction, Queen Elizabeth Hospital, Gateshead, Washington. Electronic address: faraj68@hotmail.com.
authors.forename: Radwan
authors.initials: R
authors.lastname: Faraj
authors.affiliation: Cromwell IVF and Fertility Centre, BUPA Hospital, Washington.
authors.forename: Isaac
authors.initials: I
authors.lastname: Evbuomwan
authors.affiliation: Department of Fetal Medicine, Royal Victoria Infirmary, Newcastle-upon-Tyne, United Kingdom.
authors.forename: Stephen
authors.initials: S
authors.lastname: Sturgiss
authors.affiliation: Centre for Assisted Reproduction, Queen Elizabeth Hospital, Gateshead, Washington.
authors.forename: Ian
authors.initials: I
authors.lastname: Aird
mesh_terms: D000328:Adult; D004624:Embryo Transfer / Q000379:methods*; D004715:Endometriosis / Q000150:complications; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000209:etiology / Q000628:therapy*; D018587:Oocyte Donation / Q000379:methods*; D011247:Pregnancy; D011256:Pregnancy Outcome; D016896:Treatment Outcome; D014310:Triplets