Category Archives: Embryology

Embryology By: Connie Jelkin … Continue reading →

Embryology and Incubation: Hatching Learn about the process of hatching and brooding for chickens. Check out my blog for more information: mylauraleigh.wordpress.com. By: mylauraleigh … Continue reading →

Embryology 1 By: … Continue reading →

San Francisco, CA (PRWEB) April 23, 2014 Philip E. Chenette, MD, director of Pacific Fertility Centers Fertility Preservation Program, and Joseph Conaghan, PhD, PFCs laboratory director, were recently notified that two of their abstracts on time-lapse imaging have been accepted for presentation in Munich, Germany at the 30th Annual Meeting of ESHRE, which runs from June 29 to July 2, 2014. ESHRE is the European Society of Human Reproduction and Embryology. Four international referees anonymously evaluated and selected the abstracts for oral presentation at the ESHRE meeting. For nearly three years, Pacific Fertility Center has been at the cutting edge of research involving time-lapse technology called Eeva (Early Embryo Viability Assessment). With this technology, pictures of embryos are taken at set intervals during culture without removing them from their highly controlled environment. These images are stitched together into time-lapse videos that clearly show how each embryo has developed for up to five days in culture. It has made it possible to observe subtle, yet critical, developmental errors and to enable better choices about which embryo to transfer. The first ESHRE abstract is entitled Automated time-lapse analysis in adjunctive use with morphology is highly informative for diverse embryologists to select embryos … Continue reading →

Cerebrospinal Fluid and Embryology This video is about the Cerebrospinal fluid. By: Mauro Zappaterra … Continue reading →

Embryology is the study of the formation of life, part of the studies with which developmental biology is concerned. Developmental biology examines how all forms of life begin, and how they develop into fully formed and functioning organisms. Embryology's focus is much narrower. An embryologist looks at the beginning of life from the one-celled organism, egg or sperm. Embryologists examine fertilization and track the development of the embryo until it bears a resemblance to its progenitors. For example, in human conception, embryologists would be interested in both sperm and egg, and the meeting of the two, and then would follow egg implantation and the growth of an embryo until it reaches the fetal stage. So in humans, the study of an embryo would last until about the second month of a pregnancy. Some embryologists further examine the full development of different organs in the body. For example, neuroembryology studies the way the spinal chord and central nervous system develop from the fertilized egg. Cardiologists employ embryology so they can classify the way a fertilized egg develops into the heart and lungs. Aristotle was one of the first to champion the theory of epigenesis, the concept that life forms develop into … Continue reading →

The Human Fertilisation and Embryology Act 1990 is an Act of the Parliament of the United Kingdom. It created the Human Fertilisation and Embryology Authority which is in charge of human embryo research, along with monitoring and licensing fertility clinics in the United Kingdom.[1] The Authority is composed of a chairman, a deputy chairman, and however many members are appointed by the UK Secretary of State. They are in charge of reviewing information about human embryos and subsequent development, provision of treatment services, and activities governed by the Act of 1990.[2] The Authority also offers information and advice to people seeking treatment, and to those who have donated gametes or embryos for purposes or activities covered in the Act of 1990. Some of the subjects under the Human Fertilisation and Embryology Act of 1990 are prohibitions in connection with gametes, embryos, and germ cells.[3] It also addresses licensing conditions, code of practice, and procedure of approval involving human embryos.[4] This only concerns human embryos which have reached the two cell zygote stage, at which they are considered fertilised in the act.[5] It also governs the keeping and using of human embryos, but only outside the womans body. The act contains … Continue reading →

Of the roughly 500'000 follicles that are present in the two ovaries at the beginning of sexual maturity, only around 480 reach the graafian follicle stage and are thus able to release oocytes (ovulation). This number is simply derived by multiplying the number of cycles per year (12) and the number of years in which a woman is fertile (40). Cyclic changes in the hormone household (hormonal cycle), governed by the hypothalamic-pituitary system, are responsible for the periodicity of the ovulation. In a woman, the rhythmic hormonal influence leads to the following cyclic events: In the center of this hormonal control is the hypothalamamics-hypophysial (pituitary gland) system with the two hypophysial gonadotropins FSH and LH. The pulsating liberation of GnRH by the hypothalamus is the fundamental precondition for a normal control of the cyclic ovarian function. This cyclic activity releases FSH and LH, both of which stimulate the maturation of the follicles in the ovary and trigger ovulation. During the ovarian cycle, estrogen is produced by the theca interna and follicular cells (in the so-called follicle phase) and progesterone by the corpus luteum (so-called luteal phase). Definitions GnRH: Gonadotropin- releasing hormone FSH: Follicle-stimulating hormone LH: Luteinizing hormone As a rule, … Continue reading →

Dr Sherif Zaki Embryology (1) 17-4-2014 Uploaded by: Abdo Mj. By: camteam2ndyear … Continue reading →

Dr Sherif Zaki Embryology (2) 17-4-2014 Uploaded by: Abdo Mj. By: camteam2ndyear … Continue reading →