Welcome to The Visible Embryo

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Welcome to The Visible Embryo, a comprehensive educational resource on human development from conception to birth.

The Visible Embryo provides visual references for changes in fetal development throughout pregnancy and can be navigated via fetal development or maternal changes.

The National Institutes of Child Health and Human Development awarded Phase I and Phase II Small Business Innovative Research Grants to develop The Visible Embryo. Initally designed to evaluate the internet as a teaching tool for first year medical students, The Visible Embryo is linked to over 600 educational institutions and is viewed by more than ' million visitors each month.

WHO International Clinical Trials Registry Platform
The World Health Organization (WHO) has created a new Web site to help researchers, doctors and patients obtain reliable information on high-quality clinical trials. Now you can go to one website and search all registers to identify clinical trial research underway around the world!




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Disclaimer: The Visible Embryo web site is provided for your general information only. The information contained on this site should not be treated as a substitute for medical, legal or other professional advice. Neither is The Visible Embryo responsible or liable for the contents of any websites of third parties which are listed on this site.
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No dirivative works may be made or used for commercial purposes.

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Pregnancy Timeline by SemestersFetal liver is producing blood cellsHead may position into pelvisBrain convolutions beginFull TermWhite fat begins to be madeWhite fat begins to be madeHead may position into pelvisImmune system beginningImmune system beginningPeriod of rapid brain growthBrain convolutions beginLungs begin to produce surfactantSensory brain waves begin to activateSensory brain waves begin to activateInner Ear Bones HardenBone marrow starts making blood cellsBone marrow starts making blood cellsBrown fat surrounds lymphatic systemFetal sexual organs visibleFinger and toe prints appearFinger and toe prints appearHeartbeat can be detectedHeartbeat can be detectedBasic Brain Structure in PlaceThe Appearance of SomitesFirst Detectable Brain WavesA Four Chambered HeartBeginning Cerebral HemispheresFemale Reproductive SystemEnd of Embryonic PeriodEnd of Embryonic PeriodFirst Thin Layer of Skin AppearsThird TrimesterSecond TrimesterFirst TrimesterFertilizationDevelopmental Timeline
Click weeks 0 - 40 and follow fetal growth
Google Search artcles published since 2007
April 4 - 8, 2011--------News Archive

Simple Treatment Prevents Premature Births
Treating high-risk pregnant women with the hormone progesterone cut their rate of early delivery by 45 % and helped lower the risk of breathing complications in their babies.

Babies Are Born Early Near Busy Road Intersections
Babies are born earlier when their mothers live near a concentration of freeways and main roads, reports a study of 970 mothers and their newborn babies in Logan City, a town south of Brisbane, Australia.

New Gene Influencing Risk For Developing Epilepsy
Vanderbilt University researchers have identified a new gene that can influence a person's risk for developing epilepsy.

Gene Linked To Autism's Social Dysfunction
With the help of two sets of brothers with autism, Johns Hopkins scientists have identified a gene associated with autism that appears to be linked very specifically to the severity of social interaction deficits.

Study Reveals How Eye Is Formed
Scientists at King’s College London have discovered specific cells responsible for ensuring that different parts of the eye come together during development.

WHO Child Growth Charts

Published in Nature Communications, these findings significantly enhance our understanding of how the different parts of the eye are organised into a functional organ, revealing clues as to the possible causes of congenital
malformations that can lead to life-long visual problems. The study was funded jointly by the BBSRC, Wellcome Trust and Fight for Sight.

The eye of vertebrate animals contains many different parts making up a complex anatomy. At the back of the eye is the retina, containing neurons and photoreceptors which capture light and convert it into electrical pulses transmitted to the brain. It also has a pigmented epithelial layer of cells that help to nourish the retina. In the front of the eye, behind the cornea and iris, lies the lens, which focuses light onto the retina.

Arrangement of these different parts is critical for normal vision. During development the lens and the retina come from completely different tissues, the surface ectoderm and central nervous system, respectively, which raises the question "how do they align to form a functional eye"?

This study, carried out using chicken embryos, shows that neural crest cells, a migratory cell population in the embryo, play an important role in this process. They send out a signal, called TGF-ß, to the surface ectoderm, which activates the Wnt pathway.

Together both signals act to stop the lens being established in the wrong position and ensures that it only develops next to the future retina.

Dr Andrea Streit from the Department of Craniofacial Development in the Dental Institute at King’s, eplains:

‘Neural crest cells give rise to many tissues in the head, including bones and sensory neurons, however their role in organising the eye was previously unknown.

‘This finding opens up the exciting possibility that they not only integrate eye formation, but also different components of other sense organs and sensory circuits in the head.

‘Identifying the signals was a long journey, because of the complex interactions of the TGF-ß and Wnt pathways. But we are now in a position to ask more pointed questions about how different structures in the head are formed and how this relates to developmental abnormalities in humans.’