Evidence map›Paper›PMID 27577322›Full record

ReviewJournal of assisted reproduction and genetics2016

Human embryo mosaicism: did we drop the ball on chromosomal testing?

Navid Esfandiari, Megan E Bunnell, Robert F Casper

Open access · bronzeAbstract readReview
In one paragraph

Review in Journal of assisted reproduction and genetics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
27.5field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 70 citations in OpenAlex.

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  16. Mosaicism: throwing the baby out with the bath water?Journal of assisted reproduction and genetics · 2017
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 2 countries.

Navid EsfandiariDivision of Reproductive Endocrinology and Infertility, Department of OB-GYN, Dartmouth Hitchcock Medical Center, Geisel School of Medicine, Lebanon, NH, USA. Navid.esfandiari@hitchcock.org.ORCID http://orcid.org/0000-0003-0979-5236
Megan E BunnellDivision of Reproductive Endocrinology and Infertility, Department of OB-GYN, Dartmouth Hitchcock Medical Center, Geisel School of Medicine, Lebanon, NH, USA.
Robert F CasperDivision of Reproductive Endocrinology and Infertility., Department of OB-GYN, School of Medicine, University of Toronto, Toronto, Canada.
Dartmouth–Hitchcock Medical Center · USUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

There are newly recognized challenges presented by the occurrence of mosaicism in the context of trophectoderm (TE) biopsy for pre-implantation genetic screening (PGS) in in vitro fertilization (IVF) embryos. Chromosomal mosaicism, known to be significantly higher in IVF embryos than in later prenatal samples, may contribute to errors in diagnosis. In particular, PGS may result in discarding embryos diagnosed as aneuploid but in which the inner cell mass may be completely or mainly euploid, thus representing a false positive diagnosis. Although less likely, some embryos diagnosed as euploid could be mosaic and contain some aneuploid cells, possibly impacting their implantation potential. The ability of current diagnostic techniques to detect mosaicism is limited by the number and location of TE cells in the biopsy and by the methodology used for chromosomal assessment. The clinical consequences of mosaicism are dependent on the chromosome(s) involved, the developmental stage at which the mosaicism evolved, and whether TE biopsy accurately reflects the status of the inner cell mass that forms the fetus. Consequently, in patients with no euploid embryos identified on PGS, it may be appropriate to consider the transfer of diagnosed aneuploid embryos if the TE biopsy result is a non-viable chromosomal monosomy or triploidy that could not result in a birth. It should be acknowledged in consent forms that mosaicism has the potential to impact test results and that its detection may be below the resolution of the genetic tests being used. This concept represents a major shift in current IVF practice and ought to be considered given the data, or lack thereof, of the impact of mosaicism on IVF/PGS outcomes.

Indexed as

Preimplantation DiagnosisAneuploidyBiopsyEctodermEmbryo ImplantationFemaleFertilization in VitroGenetic TestingHumansMosaicismPregnancyAneuploidyMosaicismPre-implantation genetic screeningTrophectoderm biopsy

Identifiers

PMID27577322
PMCPMC5125153
OpenAlexW2512919100

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.