Evidence map›Paper›PMID 21748341›Full record

ReviewHuman genetics2012

Preimplantation genetic diagnosis: state of the art 2011.

Joyce C Harper, Sioban B Sengupta

Abstract readReview
PubMed Publisher
In one paragraph

Review in Human genetics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed, 1 pooled it
43.7field-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

53 citing papers in PubMed, 1 synthesis or guideline pooled it, 211 citations in OpenAlex.

  1. Pooled it
  2. The number of biopsied trophectoderm cells may affect pregnancy outcomes.Journal of assisted reproduction and genetics · 2019
    Trial
  3. Article
  4. The Use of Stem Cells in Assisted Reproduction.Journal of clinical medicine · 2025
    Review
  5. Deciding on genetic testing for familial dementia: Perspectives of patients and families.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Accurate genomic variant detection in single cells with primary template-directed amplification.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  12. Genetics in human reproduction.JBRA assisted reproduction · 2020
    Review
  13. Article
  14. Review
  15. Review
  16. The status of preimplantation genetic testing in the UK and USA.Human reproduction (Oxford, England) · 2020
    Article
  17. Article
  18. Article
  19. Article
  20. Article
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

2 authors at 2 institutions in 1 country.

Joyce C HarperUCL Centre for PG&D, Institute for Womens Health, University College London, London, UK. joyce.harper@ucl.ac.uk
Sioban B Sengupta
The Centre for Reproductive & Genetic HealthUniversity College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

For the last 20 years, preimplantation genetic diagnosis (PGD) has been mostly performed on cleavage stage embryos after the biopsy of 1-2 cells and PCR and FISH have been used for the diagnosis. The main indications have been single gene disorders and inherited chromosome abnormalities. Preimplantation genetic screening (PGS) for aneuploidy is a technique that has used PGD technology to examine chromosomes in embryos from couples undergoing IVF with the aim of helping select the chromosomally 'best' embryo for transfer. It has been applied to patients of advanced maternal age, repeated implantation failure, repeated miscarriages and severe male factor infertility. Recent randomised controlled trials (RCTs) have shown that PGS performed on cleavage stage embryos for a variety of indications does not improve delivery rates. At the cleavage stage, the cells biopsied from the embryo are often not representative of the rest of the embryo due to chromosomal mosaicism. There has therefore been a move towards blastocyst and polar body biopsy, depending on the indication and regulations in specific countries (in some countries, biopsy of embryos is not allowed). Blastocyst biopsy has an added advantage as vitrification of blastocysts, even post biopsy, has been shown to be a very successful method of cryopreserving embryos. However, mosaicism is also observed in blastocysts. There have been dramatic changes in the method of diagnosing small numbers of cells for PGD. Both array-comparative genomic hybridisation and single nucleotide polymorphism arrays have been introduced clinically for PGD and PGS. For PGD, the use of SNP arrays brings with it ethical concerns as a large amount of genetic information will be available from each embryo. For PGS, RCTs need to be conducted using both array-CGH and SNP arrays to determine if either will result in an increase in delivery rates.

Indexed as

BlastocystPolar BodiesBiopsyChromosomesComparative Genomic HybridizationEmbryo, MammalianFemaleGenetic TestingHumansMolecular Diagnostic TechniquesNucleic Acid Amplification TechniquesPolymorphism, Single NucleotidePregnancyPreimplantation Diagnosis

Identifiers

PMID21748341
OpenAlexW2010659210

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.