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Embryology laboratory

Zeynep B Gürtin, Trina Shah, Jinjun Wang, Kamal Ahuja
RESEARCH QUESTION: What can we learn from 5 years of egg-freezing practice in the UK? What are the different categories of egg freezing, and what are the social and demographic characteristics of patients, and their decisions regarding subsequent storage or thawing? DESIGN: A retrospective analysis of clinical and laboratory data of all 514 cycles of 'own' egg freezing conducted at the London Women's Clinic in the 5-year period from the start of 2012 to the end of 2016...
December 11, 2018: Reproductive Biomedicine Online
Inês Pessanha, Henrique Alexandrino, Cláudia Piedade, Catarina Cunha, Isabel Gonçalves, Maria Francelina Lopes, Emanuel Furtado
INTRODUCTION: Gallbladder agenesis (GA) is a rare congenital condition, occurring in approximately 40/100.000. It is likely due to an embryologic mishap in the development of the gallbladder bud and can be associated with other congenital variations in biliary anatomy. However, the liver likely suffers no functional impairment and can be safely used for transplantation. To the best of our knowledge, this is the first case report describing a pediatric liver transplantation (PLT) using a graft with GA...
December 21, 2018: Pediatric Transplantation
Sara Ilnitsky, Lynda Hughes, Francis Tekpetey, Basim Abu Rafea, George Vilos, Angelos Vilos
OBJECTIVE: The objective of this study was to assess data from a fertility clinic and identify differences in patient and cycle characteristics, clinical pregnancy rates, and multiple gestation rates before and after fertility treatment funding and a policy of elective single embryo transfer were instituted by the Ontario government to reduce multiple gestations arising from fertility treatment. METHODS: This study was a retrospective database review of clinic and embryology laboratory data for all patients undergoing IVF and ICSI cycles over a 4-year period...
December 6, 2018: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
Elizabeth R Hammond, Dean E Morbeck
STUDY QUESTION: Can embryology key performance indicators (KPIs) detect shifts in laboratory performance that precede changes in clinical outcomes? SUMMARY ANSWER: Day 5 usable blastocyst rate (D5BUR) is an important embryology KPI that complements total usable blastocyst rate (TBUR) in its ability to rapidly identify adverse embryology outcomes, prior to changes in clinical outcomes. WHAT IS KNOWN ALREADY: The hypothesis that monitoring performance of an IVF laboratory using statistical process controls (SPCs) can act as an early warning signal of shifts in laboratory conditions is a hypothesis that requires validation...
December 4, 2018: Human Reproduction
Michael Pais, Melanie S Archer
Aging blow fly eggs can be critical to a forensic investigation, but there are currently no forensically useful timelines describing internal anatomical changes in embryological development. This is partly due to the lack of an economical, rapid and technically simple histological technique to allow mass production of slides for research and casework. We present a histological method that uses a slightly modified standard laboratory processing run with 1 h fixation in 10% formalin, 2 h softening in Molliflex and Haemotoxylin and Eosin (H&E) staining...
2018: Forensic sciences research
Mara Simopoulou, Konstantinos Sfakianoudis, Panagiotis Bakas, Polina Giannelou, Christina Papapetrou, Theodoros Kalampokas, Anna Rapani, Ekaterini Chatzaki, Maria Lambropoulou, Chrysoula Lourida, Efthymios Deligeoroglou, Konstantinos Pantos, Michael Koutsilieris
Oocyte freezing for 'social reasons' refers to women of reproductive age who are aiming to prolong, protect and secure their fertility. The term emerged to describe application of the highly promising technique, namely vitrification on oocytes retrieved through controlled ovarian stimulation (COS) from women intending to preserve their fertility for social reasons. These women opt to cryopreserve their oocytes at a point in their life when they need to postpone childbearing on the grounds of so called 'social' reasons...
October 25, 2018: Medicina
Isabella Finco, Gary D Hammer
Immunofluorescence is a well-established technique for detection of antigens in tissues with the employment of fluorochrome-conjugated antibodies and has a broad spectrum of applications. Detection of antigens allows for characterization and identification of multiple cell types. Located above the kidneys and encapsulated by a layer of mesenchymal cells, the adrenal gland is an endocrine organ composed by two different tissues with different embryological origins, the mesonephric intermediate mesoderm-derived outer cortex and the neural crest-derived inner medulla...
October 2, 2018: Journal of Visualized Experiments: JoVE
Chunming Wang, Riqiang Liu, Feifei Huang, Haiming Wei, Lei Yu
RATIONALE: Malignant mixed Müllerian tumor (MMMT) of extragenital organs is rare, especially in male. To our knowledge, this is the first reported case of primary MMMT at the mediastinum in male. PATIENT CONCERNS: A 54-year-old male was admitted to the hospital due to repeated stimulating dry cough for 2 years. His systemic examination was unremarkable. Laboratory workup revealed that all blood indicators were within normal limits. But subsequent computerized tomography (CT) scans of chest showed an abnormal soft tissue density in the area of its left, measuring approximately 4 cm in anterior-posterior dimension and 7 cm in maximum transverse dimension...
October 2018: Medicine (Baltimore)
Stephen A Stricker
Many marine invertebrates are capable of providing an abundant supply of oocytes that are fertilized external to the female body, thereby making these specimens well suited for studies of development. Along with intensively analyzed model systems belonging to such groups as echinoderms, tunicates, mollusks, and annelids, various lesser-studied taxa can undergo an external mode of fertilization. For example, nemertean worms constitute a relatively small phylum of marine protostome worms whose optically clear oocytes are easily collected and fertilized in the laboratory...
2018: Results and Problems in Cell Differentiation
Andrés Romero-Carvajal, Matthew W Turnbull, J Antonio Baeza
There are a limited number of model species for decapod experimental embryology. To improve our understanding of developmental pattern evolution in the Decapoda, here we describe the early embryonic development of the caridean shrimp Lysmata boggessi, from immediately after fertilization to the hatching of the zoea larva, using fluorescence microscopy and whole-mount nuclear staining with 4',6-diamidino-2-phenylindole. Lysmata boggessi follows the standard caridean pattern of early development, with early holoblastic cleavage that will later become superficial, to form a blastoderm...
June 2018: Biological Bulletin
John M DeSesso, Anthony R Scialli
Evaluation of the skeleton in laboratory animals is a standard component of developmental toxicology testing. Standard methods of performing the evaluation have been established, and modification of the evaluation using imaging technologies is under development. The embryology of the rodent, rabbit, and primate skeleton has been characterized in detail and summarized herein. The rich literature on variations and malformations in skeletal development that can occur in the offspring of normal animals and animals exposed to test articles in toxicology studies is reviewed...
September 1, 2018: Birth Defects Research
Selami Demirci, John F Tisdale
Derivation of functional and mature red blood cells (RBCs) with adult globin expression from renewable source such as induced pluripotent stem cells (iPSCs) is of importance from the clinical point of view. Definitive RBC generation can only be succeeded through production of true hematopoietic stem cells (HSCs). There has been a great effort to obtain definitive engraftable HSCs from iPSCs but the results were mostly unsatisfactory due to low, short-term and linage-biased engraftment in mouse models. Moreover, ex vivo differentiation approaches ended up with RBCs with mostly embryonic and fetal globin expression...
June 7, 2018: Advances in Experimental Medicine and Biology
María Luisa Lopez-Regalado, Luis Martínez-Granados, Antonio González-Utor, Nereyda Ortiz, Miriam Iglesias, Manuel Ardoy, Jose A Castilla
The Vienna consensus, based on the recommendations of an expert panel, has identified 19 performance indicators for assisted reproductive technology (ART) laboratories. Two levels of reference values are established for these performance indicators: competence and benchmark. For over 10 years, the Spanish embryology association (ASEBIR) has participated in the definition and design of ART performance indicators, seeking to establish specific guidelines for ART laboratories to enhance quality, safety and patient welfare...
August 2018: Reproductive Biomedicine Online
Joni Ollonen, Filipe O Da Silva, Kristin Mahlow, Nicolas Di-Poï
The rise of the Evo-Devo field and the development of multidisciplinary research tools at various levels of biological organization have led to a growing interest in researching for new non-model organisms. Squamates (lizards and snakes) are particularly important for understanding fundamental questions about the evolution of vertebrates because of their high diversity and evolutionary innovations and adaptations that portrait a striking body plan change that reached its extreme in snakes. Yet, little is known about the intricate connection between phenotype and genotype in squamates, partly due to limited developmental knowledge and incomplete characterization of embryonic development...
2018: Frontiers in Physiology
Ilaria Amodeo, Mariarosa Colnaghi, Genny Raffaeli, Giacomo Cavallaro, Fabrizio Ciralli, Silvana Gangi, Ernesto Leva, Lorenzo Pignataro, Irene Borzani, Lorenza Pugni, Fabio Mosca
RATIONALE: Lymphatic malformations (LMs) are rare and benign anomalies resulting from the defective embryological development of the primordial lymphatic structures. Due to their permeative growth throughout all tissue layers, treatment is often challenging. Small asymptomatic lesions can be conservatively managed, while symptomatic lesions require active management. Surgery has been historically considered the treatment of choice, but today less invasive therapeutic options are preferred (sclerotherapy, laser therapy, oral medications)...
December 2017: Medicine (Baltimore)
Masatoshi Takeichi
The cadherin family of cell-cell adhesion molecules plays a pivotal role in animal tissue formation. Discovery of this molecular family can be traced back to some unexpected observations of strange cell behavior that were made around 1970 in the Kyoto University laboratory of Tokindo Okada, and then in the Department of Embryology at the Carnegie Institution of Washington (currently the Carnegie Institution for Science). This article looks back on these discoveries, and recalls how these observations led to the identification of important cell-cell adhesion molecules known as cadherins...
January 2018: Development, Growth & Differentiation
Sasan Amirhassankhani, Mark S Lloyd
Accessory auricles are rare congenital abnormalities embryologically derived from the first branchial arch. Presentation may be variable with locations grouped into anatomical zones based on the frequency of location found in the literature. This study reviewed the papers between 1981 and 2017. Findings included an association with syndromes including Goldenhar, VACTERL, Treacher-Collins, Townes-Brocks, and Wolf-Hirschhorn. Based on histological and embryological evidence, the term "accessory auricle" is best used as an umbrella term to define this difference...
March 2018: Journal of Craniofacial Surgery
Tarek K Al-Hussaini, Ahmed A Abdelaleem, Ihab Elnashar, Omar M Shabaan, Rashad Mostafa, Mona A H El-Baz, Sahar E M El-Deek, Tarek A Farghaly
OBJECTIVES: The present study evaluated the correlation between the concentrations of polychlorinated biphenyls (PCBs) and pesticides in the follicular fluid (FF) obtained during intracytoplasmic sperm injection (ICSI) with the ovarian response, endometrial thickness, and embryological and clinical outcomes. DESIGN: Cross-sectional observational study. MATERIALS AND METHODS: Women aged 20 to 38 years (300 infertile couples) presenting to a university-affiliated fertility center were approached to participate in the study...
January 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Fernando Zegers-Hochschild, G David Adamson, Silke Dyer, Catherine Racowsky, Jacques de Mouzon, Rebecca Sokol, Laura Rienzi, Arne Sunde, Lone Schmidt, Ian D Cooke, Joe Leigh Simpson, Sheryl van der Poel
STUDY QUESTION: Can a consensus and evidence-driven set of terms and definitions be generated to be used globally in order to ensure consistency when reporting on infertility issues and fertility care interventions, as well as to harmonize communication among the medical and scientific communities, policy-makers, and lay public including individuals and couples experiencing fertility problems? SUMMARY ANSWER: A set of 283 consensus-based and evidence-driven terminologies used in infertility and fertility care has been generated through an inclusive consensus-based process with multiple stakeholders...
September 1, 2017: Human Reproduction
Nikica Zaninovic, Mohamad Irani, Marcos Meseguer
Time-lapse microscopy (TLM) is an exciting novel technology with great potential for enhancing embryo selection in the embryology laboratory. This non-invasive objective assessment of embryos has provided a new tool for predicting embryo development and implantation potential. TLM detects several morphological phenomena that are often missed with static observations using conventional incubators, such as irregular divisions, blastocyst collapse and re-expansion, timing of blastocoel appearance, and timing of formation and internalization of fragments...
November 2017: Fertility and Sterility
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