title: Conjoined twins in a monochorionic triplet pregnancy after in vitro fertilization: a case report.
abstract: BACKGROUND
  Monozygotic monochorionic triplet pregnancy with conjoined twins is a very rare condition and is associated with many complications.
  
  
  METHODS
  In this study, we describe a monochorionic-diamniotic triplet pregnancy after in vitro fertilization with an intracytoplasmic sperm injection. At a gestational age of 6 weeks and 4 days of pregnancy one gestational sac was observed, and at a gestational age of 12 weeks and 2 days, triplets with conjoined twins were diagnosed. After consulting with the parents, they chose fetal reduction of the conjoined twins. Selective feticide was successfully performed by radiofrequency ablation at 16 weeks of pregnancy. Unfortunately, the day after the procedure, the membrane ruptured, and 1 week later, all fetuses and placenta were spontaneously aborted.
  
  
  CONCLUSIONS
  Monochorionic triplet pregnancy with conjoined twins is very rare. These pregnancies are associated with very serious complications. Intra cytoplasmic sperm injection increases the rate of monozygotic twinning and conjoined twins. Counseling with parents before IVF is very important.
authors.affiliation: Department of Obstetrics and Gynecology, Women Moheb Yas Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Talebian
authors.affiliation: Department of Obstetrics and Gynecology, Women Moheb Yas Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Rahimi-Sharbaf
authors.affiliation: Department of Obstetrics and Gynecology, Women Moheb Yas Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Mahboobeh
authors.initials: M
authors.lastname: Shirazi
authors.affiliation: Department of Obstetrics and Gynecology, Zahedan University of Medical Sciences, Zahedan, Iran.
authors.forename: Batool
authors.initials: B
authors.lastname: Teimoori
authors.affiliation: Department of Pathology, Women Moheb Yas Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Narges
authors.initials: N
authors.lastname: Izadi-Mood
authors.affiliation: Department of Pathology, Women Moheb Yas Hospital, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Soheila
authors.initials: S
authors.lastname: Sarmadi
keywords: Conjoined twins; Monochorionic-Diamniotic; Radiofrequency ablation; Triplet pregnancy