title: Conjoined twins in a spontaneous trichorionic quadruplet pregnancy: a case report.
abstract: BACKGROUND
  Multifetal pregnancies are high-risk pregnancies. Coexistence of conjoint twins with multifetal pregnancies further increases the risk factor, which is already considerably high with multiple births. Assisted reproductive techniques lead to an increase in multifetal pregnancies, especially monozygotic pregnancies, which in turn lead to an increase in the rate of conjoined twins.
  
  
  METHODS
  A spontaneously achieved quadruplet pregnancy with coexisting conjoint twins has not been reported previously. We report one such case of spontaneously achieved quadruplet pregnancy with coexisting conjoined twins.
  
  
  CONCLUSIONS
  Early (preferably first trimester) recognition of multifetal pregnancy, chorionicity, amnionicity and fetal malformation help in proper pregnancy management and optimizing outcome.
authors.affiliation: Department of Radiodiagnosis and Imaging, Postgraduate Institute of Medical Sciences, University of Health Sciences, Rohtak, India.
authors.forename: Seema
authors.initials: S
authors.lastname: Rohilla
authors.forename: Krishna
authors.initials: K
authors.lastname: Dahiya
authors.forename: Sureshkanta
authors.initials: S
authors.lastname: Rathee
authors.forename: Rohtas K
authors.initials: RK
authors.lastname: Yadav
authors.forename: Dhara B
authors.initials: DB
authors.lastname: Dhaulakhandi
mesh_terms: D017809:Fatal Outcome; D005260:Female; D005313:Fetal Death / Q000000981:diagnostic imaging*; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D011783:Quadruplets; D014428:Twins, Conjoined; D016216:Ultrasonography, Prenatal; D055815:Young Adult