ArticleJournal of assisted reproduction and genetics2023
Assessing the clinical viability of micro 3 pronuclei zygotes.
Article in Journal of assisted reproduction and genetics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 6 papers.
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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.
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.
Efficacy of PGT-A Upgrade in Preimplantation Genetic Testing of Embryos: An International Multicenter Prospective Clinical Study
Outcomes of Embryos Created From Abnormally Fertilized Oocytes
Who cites it
6 citing papers in PubMed.
- Not all abnormal fertilization is equal: occurrence, developmental competence, and ploidy outcomes of 1PN, 3PN, and 2.1PN zygotes in ICSI/PGT-A cycles.Journal of assisted reproduction and genetics · 2026Article
- To discard or to not discard 2.1PN? A systematic review and evidence table analysis.Journal of assisted reproduction and genetics · 2026Review
- Clinical outcomes of 1PN- and 3PN-derived blastocysts in the absence of transferable 2PN embryos: A retrospective analysis.PloS one · 2026Article
- A 3PN zygote can be transferred after PGT-A and embryo ploidy analysis: A case report of a healthy neonate.JBRA assisted reproduction · 2026Article
- Incidence of haploidy and triploidy in trophectoderm biopsies of blastocysts derived from normally and abnormally fertilized oocytes.Journal of assisted reproduction and genetics · 2024Article
- The utility of human two plus one small pronucleated zygotes (2.1PN) based on clinical outcomes and the focused ploidy analysis.Journal of assisted reproduction and genetics · 2024Article
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Authors and funding
10 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeWhat is the rate of euploidy and clinical viability of embryos resulting from micro 3 pronuclei zygotes?
methodsRetrospective cohort analysis in a single, academic in vitro fertilization (IVF) center from March 2018 to June 2021. Cohorts were separated by fertilization as either a 2 pronuclear zygote (2PN) or micro 3 pronuclear zygote (micro 3PN). PGT-A was performed to identify embryonic ploidy rates in embryos created from micro 3PN zygotes. The clinical outcomes of all transferred euploid micro 3PN zygotes were evaluated from frozen embryo transfer (FET) cycles.
resultsDuring the designated study period, 75,903 mature oocytes were retrieved and underwent ICSI. Of these, 60,161 were fertilized as 2PN zygotes (79.3%) and 183 fertilized as micro 3PN zygotes (0.24%). Of the micro 3PN-derived embryos that underwent biopsy, 27.5% (n=11/42) were deemed euploid by PGT-A, compared to 51.4% (n=12,301/23,923) of 2PN-derived embryos, p=0.06. Four micro 3PN-derived embryos were transferred in subsequent single euploid FET cycles, which includes one live birth and one ongoing pregnancy.
conclusionMicro 3PN zygotes that develop to the blastocyst stage and meet the criteria for embryo biopsy have the potential to be euploid by preimplantation genetic testing for aneuploidy (PGT-A) and if selected for transfer can achieve a live birth. Although there are a significantly lower number of micro 3PN embryos that make it to blastocyst biopsy, the potential to continue to culture abnormally fertilized oocytes may give these patients a chance at pregnancy that they previously did not have.
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Registered trials
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.