Document Detail

Pregnancy complicated by triploidy: a comparison of the three karyotypes.
MedLine Citation:
PMID:  19391081     Owner:  NLM     Status:  MEDLINE    
We evaluated triploid pregnancy to determine whether there are clinically important differences between the three karyotypes: 69,XXX, 69,XXY, and 69,XYY. Prospectively maintained cytogenetic databases at five tertiary care centers were retrospectively reviewed over a 10-year period to identify all triploid pregnancies. Targeted ultrasounds were reviewed to identify fetal and placental findings. Sonographic findings were compared by karyotype. There was a total of 549 triploid gestations; preimplantation genetic diagnosis (PGD) detected 413 triploid embryos, and the cytogenetic databases provided 136 clinical pregnancies with triploidy. In triploid embryos with PGD, the frequency of the 69,XYY karyotype was 8.7% (36/413), compared with 0.74% (1/136) during the first trimester of clinical pregnancies (p = 0.002). In clinical pregnancies, 60% (36/60) of 69,XXY fetuses survived the first trimester of development compared with 69% (52/75) of 69,XXX fetuses (p = NS). No clinically important differences were observed between 69,XXX and 69,XXY karyotypes in terms of type, number, or severity of fetal or placental anomalies. Gestations with a 69,XYY karyotype are found less frequently compared with gestations with a 69,XXX or 69,XXY karyotype. The decline in fetal survival of the 69,XYY triploid karyotype needs further investigation. There are significant abnormalities detected during prenatal sonography in most all clinically recognized cases of triploidy. Sonography cannot reliably distinguish between the 69,XXY and 69,XXX karyotypes.
Dennis T McWeeney; Santiago Munn??; Richard C Miller; Natalie A Cekleniak; Stephen A Contag; Joseph R Wax; William J Polzin; William J Watson
Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2009-04-23
Journal Detail:
Title:  American journal of perinatology     Volume:  26     ISSN:  1098-8785     ISO Abbreviation:  Am J Perinatol     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-09-16     Completed Date:  2010-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8405212     Medline TA:  Am J Perinatol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  641-5     Citation Subset:  IM    
Copyright Information:
Thieme Medical Publishers.
Division of Maternal-Fetal Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA.
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MeSH Terms
Chromosome Aberrations
Chromosomes, Human, X / genetics
Chromosomes, Human, Y / genetics
Cohort Studies
Congenital Abnormalities / genetics,  ultrasonography*
Pregnancy Complications / genetics,  ultrasonography*
Pregnancy Outcome
Pregnancy Trimester, Second
Retrospective Studies
Risk Assessment
Sex Chromosomes / genetics*
Ultrasonography, Doppler*
Young Adult

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