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We report a successful ongoing pregnancy obtained in a case of total globozoospermia after intracytoplasmic morphologically selected sperm injection (IMSI) with oocyte activation. The first semen analysis on investigation showed partial globozoospermia. However, under high magnification assessment at oocyte retrieval only round headed sperm were observed. Considering the high risk of a complete failure to fertilize from IMSI the couple gave written informed consent to the use of oocyte activation media post IMSI. One embryo fertilized, developed to a hatching blastocyst and was transferred resulting in an ongoing pregnancy. This successful outcome shows the use of IMSI is useful in the evaluation of total globozooozpermia and therefore aids in the justification of the use of oocyte activation media.
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http://dx.doi.org/10.1186/s12978-015-0031-x | DOI Listing |
J Reprod Dev
September 2025
Laboratory of Animal Science, College of Agriculture and Marine Science, Kochi University, Kochi 783-8502, Japan.
Immature zebrafish oocytes are highly susceptible to high temperatures, making it difficult to warm cryopreserved oocytes rapidly. In the present study, we aimed to investigate whether thermosensitive channels, lipid mediators, and ferroptosis are involved in heat stress-induced injury in immature zebrafish oocytes. Oocytes were injected with inhibitors of a heat-sensitive channel (TRPV1) and multiple enzymes-cytosolic phospholipase Aα (cPLAα), cyclooxygenases (COXs), arachidonate lipoxygenase 5 (ALOX5), and lysophosphatidylcholine acyltransferase 2 (LPCAT2).
View Article and Find Full Text PDFDev Biol
September 2025
Department of Biological Sciences, University of Denver, Denver, CO 80208, USA; Department of Biochemistry and Biophysics, AgriLife Research, Texas A&M University, College Station, TX 77843, USA. Electronic address:
During fertilization, sperm and egg membranes signal and fuse to form a zygote and begin embryonic development. As lipids participate in signaling and membrane fusion, we investigated the role of lipid asymmetry in gametogenesis, fertilization, and embryogenesis. We show that the lipid flippase TAT-5, an essential P4-ATPase that maintains phosphatidylethanolamine asymmetry, is required for both oocyte formation and sperm activation, albeit at different levels of flippase activity.
View Article and Find Full Text PDFProg Nucl Magn Reson Spectrosc
September 2025
Central European Institute of Technology, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic. Electronic address:
In-cell NMR spectroscopy has recently emerged as a unique source of atomically resolved information on the structure, dynamics, and interactions of nucleic acids (NAs) within the intracellular space of living cells. Its recent applications have helped reveal fundamental differences in the behaviour of NAs in cells compared to the in vitro conditions commonly used for their study, as well as in physiologically distinct cellular states. This review covers the fundamental principles and practical aspects of acquiring in-cell NMR data in currently established eukaryotic cellular models, Xenopus laevis oocytes, and human cells.
View Article and Find Full Text PDFHum Reprod
September 2025
IVIRMA Global Research Alliance, Genera, Clinica Valle Giulia, Rome, Italy.
Study Question: Do IVF laboratory workflows influence the mean blastulation rate per cohort of inseminated metaphase II oocytes (m-BR)?
Summary Answer: Neither the total number of procedures nor the workload per operator affected m-BR; instead, each additional hour in the interval from ovulation trigger to oocyte denudation (range 36-44 h) was associated with a measurable decline, especially beyond the 40-h threshold.
What Is Known Already: Control of laboratory conditions and standardized protocols are essential for optimizing m-BR in IVF. While advancements in technology and culture systems have improved ART outcomes, the effect of laboratory managerial decisions and procedural timing on embryological outcomes remains unclear.
EMBO Rep
September 2025
School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, E1 4NS, London, UK.
Early animal development can be remarkably variable, influenced by lineage-specific reproductive strategies and adaptations. Yet, early embryogenesis is also strikingly conserved in certain groups, such as Spiralia. In this clade, a shared cleavage program (i.
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