ReviewJournal of animal science2020
The incompletely fulfilled promise of embryo transfer in cattle-why aren't pregnancy rates greater and what can we do about it?
Review in Journal of animal science, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 1 of them a synthesis that pooled 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.
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.
Who cites it
68 citing papers in PubMed, 1 synthesis or guideline pooled it, 144 citations in OpenAlex.
- Lineage Differentiation Markers as a Proxy for Embryo Viability in Farm Ungulates.Frontiers in veterinary science · 2021Pooled it
- Pregnancy Outcomes Following Artificial Insemination and Embryo Transfer in Dairy Cows-Expectations vs. Reality.Reproduction in domestic animals = Zuchthygiene · 2026Review
- Malonic acid promotes glycolytic activity in cumulus cells and improves the quality of bovine oocytes matured in vitro.The Journal of reproduction and development · 2026Article
- Acclimation During the 7-Day CO-Synch + CIDR Protocol Improves Temperament and Pregnancy Rate to Timed Artificial Insemination inAnimals : an open access journal from MDPI · 2026Article
- Embryo transfer in dairy herds: a comprehensive review of factors affecting pregnancy success from donor to embryo and recipient.Veterinary research communications · 2026Review
- Role of Fisetin in the Mammalian Reproductive System.Veterinary sciences · 2026Review
- Evaluation of the functional role of corpus luteum cavity in recipient selection for bovine embryo transfer.Animal bioscience · 2026Article
- Effects of leonurine supplementation during in vitro culture on oxidative stress, cell proliferation, apoptosis, and autophagy in bovine embryos.Scientific reports · 2026Article
- In Vitro Developmental Competence Predicts Pregnancy Outcomes Following Transfer of Beef Embryos to Dairy Recipients: A Retrospective Study.Animals : an open access journal from MDPI · 2026Article
- Effects of donor breed and season of year onAnimal reproduction · 2026Article
- When bovine life begins in a petri dish: transcriptomic insights from embryos to calves conceived in vitro.The Journal of reproduction and development · 2026Review
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- Foundational reproduction programs for U.S. dairy herds.The Journal of reproduction and development · 2026Review
- Vitrification of bovine oocytes and embryos: roadmaps to cryopreservation success.Animal reproduction · 2026Article
- In vitro production significantly reduces metabolic differences among bovine embryos.Metabolomics : Official journal of the Metabolomic Society · 2025Article
- The intersection of biology and advanced technologies defines the future of dairy reproductive management.JDS communications · 2025Review
- The Effects of Environmental and Management Factors on the Quality of the Corpus Luteum and Subsequent Conception Rates of Beef and Dairy Cows in South Africa.Life (Basel, Switzerland) · 2025Article
- Enhancing gene expression studies in bovine embryos fertilized in vitro: Identifying stable reference genes across blastocysts with different developmental speeds.The Journal of reproduction and development · 2025Article
- Comparative transcriptome analysis of bovine blastocysts reveals specific effects of the oocyte source and the environments during maturation and early embryo development.BMC genomics · 2025Article
8 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
1 author at 1 institution in 1 country.
Funding
Abstract
Typically, bovine embryos are transferred into recipient females about day 7 after estrus or anticipated ovulation, when the embryo has reached the blastocyst stage of development. All the biological and technical causes for failure of a female to produce a blastocyst 7 d after natural or artificial insemination (AI) are avoided when a blastocyst-stage embryo is transferred into the female. It is reasonable to expect, therefore, that pregnancy success would be higher for embryo transfer (ET) recipients than for inseminated females. This expectation is not usually met unless the recipient is exposed to heat stress or is classified as a repeat-breeder female. Rather, pregnancy success is generally similar for ET and AI. The implication is that either one or more of the technical aspects of ET have not yet been optimized or that underlying female fertility that causes an embryo to die before day 7 also causes it to die later in pregnancy. Improvements in pregnancy success after ET will depend upon making a better embryo, improving uterine receptivity, and forging new tools for production and transfer of embryos. Key to accelerating progress in improving pregnancy rates will be the identification of phenotypes or phenomes that allow the prediction of embryo competence for survival and maternal capacity to support embryonic development.
Indexed as
Identifiers
What OpenQuestion holds
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.