Chromosomal instability in first trimester miscarriage: a common cause of pregnancy loss?

Translational Pediatrics
Philip John Hardy, Kathy Hardy

Abstract

First trimester miscarriage without underlying medical conditions is most commonly caused by chromosomal abnormalities reported to occur in 50% or more of cases. These chromosomal changes in early losses include both numerical abnormalities and structural alterations that result in gain and/or loss of genetic information. Structural alterations are much less common than numerical changes. Jumping translocations (JTs) are considered extremely rare with only four cases previously reported. We report 12 examples of chromosome instability seen in the fetal material of spontaneous first trimester miscarriages in a single study population. In these examples, we observed different cell lines with related chromosomal alterations. Some may be considered to be JT, where a single donor site was observed with different recipients. Others involved more than one site on the "donor" chromosome. One reported miscarriage involved multiple aneuploidy. All alterations resulted in partial trisomies and monosomies which predisposed the pregnancy to chromosomal imbalance and subsequent demise. Patient demographic data did not indicate possible causes of the errors observed. This is the first report of such a large cohort and is believed to be the re...Continue Reading

Citations

Oct 30, 2019·Journal of Clinical Laboratory Analysis·Marzieh GhasemiSaeedeh Salimi
Jul 17, 2020·Future Science OA·Muhammad Sanusi YahayaAbdwahid Haron

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