To diagnose triploidy, doctors administer a karyotype, or chromosome analysis, to count chromosomes in the cells. This requires a sample of the amniotic fluid (through amniocentesis) or the placenta (through chorionic villus sampling).

Can triploidy be seen on ultrasound?

INTRODUCTION. Triploidy is a lethal chromosomal abnormality characterized by an extra set of haploid chromosomes, leading to 69 chromosomes. The prevalence of triploidy at the 11–14-week ultrasound scan is approximately 1:33001.

How is triploidy syndrome diagnosed?

The diagnosis can be confirmed after birth by chromosome analysis of tissue (skin) obtained from the affected infant. Triploidy cannot be diagnosed by chromosome microarray testing. The accuracy of non-invasive prenatal testing using cell-free fetal (cff) DNA in the diagnosis of triploidy is still being studied.