Many of the thousands of human embryos currently in cryogenic storage will sooner or later be discarded, often after being experimented upon. Others will remain in storage indefinitely, left there by parents who have no plans either to bring them to term or to offer them for adoption. These facts, coupled with a commitment to the basic moral equality of all human beings at all stages of development, generate a pressing question: What should be done for these embryos whose vital activities have been suspended and whose futures look so bleak? This paper offers a case that allows some of these cryogenically stored embryos to thaw and die, allows disposal of their remains in a manner that reflects their status, and is morally acceptable in that it is consistent with the principles that many accept as governing the removal of life-sustaining treatment in end-of-life cases.
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Cryobiology
January 2025
Yanbian University College of Agriculture, Yanbian Korean Autonomous Prefecture, 133000,China. Electronic address:
Vitrification is a conventional and mature method for embryo cryopreservation, but ice crystals formed during the vitrification process can damage embryos. HPC has the property of forming a high-viscosity gel under low-temperature conditions, so it can be added to vitrification solutions to investigate whether it improves the negative impact of vitrification on embryos. The results showed that the addition of HPC (50 μg/ml) to the vitrification solution significantly increased the post-warming survival rate of sheep morula embryos.
View Article and Find Full Text PDFJ Assist Reprod Genet
January 2025
Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
Purpose: This study is to evaluate duration of oocyte cryostorage and association with thaw survival, fertilization, blastulation, ploidy rates, and pregnancy outcomes in patients seeking fertility preservation.
Methods: Retrospective cohort study to evaluate clinical outcomes in patients who underwent fertility preservation from 2011 to 2023 via oocyte vitrification for non-oncologic indications. Primary outcome was thaw survival rate.
Expert Rev Endocrinol Metab
January 2025
Department of OBGYN, Grossman School of Medicine, New York University, NY, USA.
Theriogenology
December 2024
University of Utrecht, Department of Clinical Sciences, Netherlands.
Mol Genet Genomics
December 2024
Center for Reproductive Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, 450052, Henan, China.
Given the high morbidity, mortality, and hereditary risk of cardiovascular diseases (CVDs), their prevention and control have garnered widespread attention and remain central to clinical research. This study aims to assess the feasibility and necessity of haplotyping-based preimplantation genetic testing for the prevention of inherited CVD. A total of 15 preimplantation genetic testing for monogenic defect (PGT-M) cycles were performed in 12 CVD families from January 2016 to July 2022.
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