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Embryology is the branch of biology that studies the prenatal development of gametes, fertilization, and development of embryos and fetuses. Additionally, embryology encompasses the study of congenital disorders that occur before birth, known as teratology. Embryology has a long history.

454 Results for the subject "Embryology":

Scientific articleAgenesis of penis: Embryology and management

AbstractThe embryology and other developmental anomalies of agenesis of the penis have been presented together with two cases. We think that patients who fit into this category should be raised as females. Our suggested therapy will enable the patient to function psychologically and sexually as a female.

Warren O. Kessler Publication date: 1973/03/01
Normal embryology and teratogenesis: Implications for pathological development from experimental embryology☆

AbstractExperimental and descriptive embryology have given insight into many congenital malformations, but as yet have contributed little toward their elimination or control. Until normal development is well understood, not much can be accomplished in the way of prevention. When malformations are associated with drugs or disease, then it is relatively easy to control abnormal births. However, when structures develop abnormally during a course of apparent normal gestation, it is difficult to conceive of an effective control.Experiments on normal chondrogenic tissues have aded to our understanding of the formation of vertebrae, ribs, and limbs. Much remains to be done to apply the information obtained from experimental embryology to the problem of teratogenesis. Teratogenesis is a manifestation of pathological embryology, a statistical event in the never perfect process of development. As such it will probably never be eliminated as a medical problem, although it may come to be understoo Read more...

James W. Lash Publication date: 1964/12/01
CommentaryThe future of the Human Fertilisation and Embryology Authority

AbstractThe UK Government has proposed that the Human Fertilisation and Embryology Authority (HFEA) should be abolished and its functions transferred to the Care Quality Commission. This commentary explores the problems with this proposal and suggests that an independent review of how the HFEA carries out its functions and a subsequent reform of some of its practices represent a better option for the UK.

Veronica English Publication date: 2013/04/01
Surgical Embryology and Anatomy of the Pancreas

Knowledge of the surgical embryology and surgical anatomy of the pancreas is vital to the general surgeon. This article discusses the entities related to pancreatic surgery. It also highlights some common embryologic anomalies of the pancreas.

Lee John Skandalakis Publication date: 1993/08/01
Embryology in Relation to Physiology and Genetics*

Publisher SummaryThis chapter focuses on embryology in relation to physiology and genetics. Ever since the discovery of double fertilization in 1898 the study of the embryology of angiosperms has made rapid progress. Apart from its role in taxonomy embryology has a close relation to physiology and genetics. The in vitro culture of embryos, endosperm, ovules, ovaries, flowers and anthers has considerably advanced our understanding of the physiology of these organs. The test-tube fertilization of ovules followed by their full development into seeds is another notable achievement. The most rewarding approach to the study of control of fertilization would be through coordinated embryological, physiological and biochemical investigations on the pollen tube, stigma, style and ovary, coupled with genetical research on sexual incompatibilities. From the viewpoint of physiology and morphogenesis a study of the embryos of the orchids, insectivorous plants and certain phanerogamic parasites and s Read more...

P. Maheshwari Publication date: 1966/01/01
The embryology of the diaphragm

Despite the progress in prenatal diagnosis and intervention as well as postnatal therapeutic strategies, congenital diaphragmatic hernia (CDH) is still associated with a meaningful mortality because of the induced pulmonary hypoplasia. An essential key in understanding the pathogenesis of CDH is the underlying embryology, which has been neglected during the last decades. Likewise, the development of the normal diaphragm is still poorly understood. Obsolescent perceptions, mainly formed from histologic sections, are still propagated. In this review we present an atlas of scanning electron microscopy images that depict the normal and defective development of the diaphragm in the nitrofen rat model for CDH. Our findings suggest that the normal diaphragm mainly develops from the posthepatic mesenchymal plate. If the development of the posthepatic mesenchymal plate is impaired, a diaphragmatic defect occurs.

Steffi Mayer Publication date: 2011/08/01
1 - Lung Anatomy

AbstractThe microanatomy of the lung holds the key to understanding lung pathology. Unfortunately this complex organ poses particular challenges for two-dimensional analysis under the microscope. From embryology to differentiated cellular morphology, this introductory chapter describes the primary histologic lobular landmarks and couples these with their respective functional components. Together these provide a foundation for understanding the relationship between location of disease and the clinical/radiologic consequences that result.

Kevin O. Leslie Publication date: 2018/01/01
A multimedia approach for teaching human embryology: Development and evaluation of a methodology

AbstractHuman embryology requires students to understand the simultaneous changes in embryos, but students find it difficult to grasp the concepts presented and to visualise the related processes in three dimensions. The aims of this study have been to develop and evaluate new educational materials and a teaching methodology based on multimedia approaches to improve the comprehension of human development. The materials developed at the State University of Campinas include clinical histories, movies, animations, and ultrasound, as well as autopsy images from embryos and foetuses. The series of embryology lectures were divided into two parts. The first part of the series addressed the development of the body's structures, while in the second part, clinical history and the corresponding materials were shown to the students, who were encouraged to discuss the malformations. The teaching materials were made available on software used by the students in classes. At the end of the discipline, Read more...

Suzana Guimarães Moraes Publication date: 2010/12/20
Case reportRetroaortic innominate vein with coarctation of the aorta: surgical repair and embryology review

AbstractA newborn girl with a retroaortic innominate vein, coarctation of the aorta, ventricular septal defect, and subaortic stenosis underwent a complete repair at 8 days of age. The ascending aorta was transected and the innominate vein was brought in front of it. We review the anatomy and embryology of this rare entity and describe the surgical technique to avoid recoarctation and innomante vein compression.

Igor E Konstantinov Publication date: 2003/03/01
CommentaryConcerns of sex selection and regulation in the report on Human Reproductive Technologies and the Law

AbstractThe House of Commons Science and Technology Select Committee, comprising 11 members, reviewed human reproductive technologies and the law and presented their fifth report of Session 2004–05 on 28 March 2005. They felt ‘it necessary to reconnect the Human Fertilisation and Embryology Act of 1990 with the changes in modern science’.

G Bahadur Publication date: 2005/01/01
Assisted reproduction

AbstractAssisted reproduction in the UK is regulated by the Human Fertilisation and Embryology Authority, which is required to regulate in accordance with the requirement of the Human Fertilisation and Embryology Act (1990) that the welfare of children that might result from assisted reproduction should be considered. This contribution raises an important problem in how we can think of the welfare of such children and demonstrates how this makes a difference for how we think of so-called ‘saviour siblings’.

John McMillan Publication date: 2005/02/01
Ectopic Renal Tissue Associated with an Undescended Testis: A Case Report

AbstractWe report a unique case of isolated ectopic renal tissue associated with an undescended testis. The pathological findings are outlined, and the embryology of renal and testicular development is reviewed. A possible explanation for ectopic renal tissue associated with an undescended testis is presented in conjunction with the normal embryology.

E.M. McDougall Publication date: 1986/05/01
Embryonic development of a collembolan, Tomocerus cuspidatus Börner, 1909: With special reference to the development and developmental potential of serosa (Hexapoda: Collembola, Tomoceridae)

Highlights•Embryogenesis of a springtail sp. was examined, focusing on development of serosa.•Collembolan serosa was revealed to retain ability to differentiate into body element.•In light of comparative embryology the basal splitting of Hexapoda was reconstructed.•Ellipura and Cercophora are strongly supported, while Entognatha is dismissed.

Shigekazu Tomizuka Publication date: 2015/03/01
In vitro fertilizationQuantitative and qualitative analysis of microorganisms in an assisted reproductive technology facility

ObjectiveTo perform a quantitative and qualitative analysis of the environmental microorganisms associated with two assisted reproductive technology (ART) laboratories.DesignProspective descriptive study.SettingTwo ART laboratories at Greenville Hospital System (GHS) University Medical Center in Greenville, South Carolina.Patient(s)None.Intervention(s)None.Main Outcome Measure(s)Quantitative and qualitative analysis of colony-forming units (CFU; bacteria and fungi) and particles from an embryology clean room and an andrology laboratory.Result(s)Within these laboratories, three of the sites sampled differed significantly in the mean number of CFU per plate. These sites included external laboratory surfaces, laboratory room air, and air within cell-culture incubators. The mean number of viable CFU per cubic meter of laboratory room air differed significantly between the two laboratories. A total of 23 unique microbial species were isolated from the andrology laboratory, whereas 10 unique Read more...

Jason L. Herlong Publication date: 2008/04/01
ReviewElizabeth M. Ramsey and the evolution of ideas of uteroplacental blood flow and placental gas exchange

AbstractDuring the past century a number of investigators have contributed to an understanding of the regulation of uteroplacental blood flow and its influence on placental respiratory gas exchange and fetal oxygenation. Among these, Elizabeth M. Ramsey is noteworthy for her contributions to embryology and placental development. In addition, with several colleagues she performed pioneering cineangiographic studies on the patterns of blood flow in the primate placenta.

Lawrence D. Longo Publication date: 2000/06/01
9 - Embryology

No abstract

O.J. LEHMANN Publication date: 1993/01/01
Embryology, sternal clefts, ectopia cordis, and Cantrell's pentalogy

Sternal clefts, ectopia cordis, and Cantrell's pentalogy continue to be very rare congenital anomalies in pediatric surgery. Unfortunately, these conditions present as neonatal emergencies and demand early surgical intervention. This article reviews the embryological development of the chest wall, specific sternal defect anomalies, along with available methods of treatment.

Scott A. Engum Publication date: 2008/08/01
Embryology of the distal urethra and external genitals

Faulty ventral openings of the urethra constitute a broad spectrum of malformations that are subsumed under the term “hypospadia.” The normal development of the urethra and the genitals critically depends on the following events: (a) formation of the external genitalia, (b) fate of the cloacal membrane, and (c) formation of the distal urethra. The purpose of this study was to demonstrate these events using microsurgical techniques and scanning electron microscopy in staged rat embryos.

Dietrich Kluth Publication date: 2011/08/01
CHAPTER II - EMBRYOLOGY OF THE EYE

No abstract

I.G. SOMMERS Publication date: 2013/01/01
3 - Basic Embryology

No abstract

David L. Bolender Publication date: 2017/01/01
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