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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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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
 
August 18, 2011--------News Archive

Hydrodynamics Transform Embryonic Cells Into Us
Hydrodynamics can contribute to our understanding of how a cluster of embryonic cells can transform into an animal.

New Data on Adenine, a Crucial Building Block of Life
The five nucleic acids making up DNA are some of the few that can withstand ultraviolet light. But adenine turns out to have an extensive range of respones.


August 18, 2011--------News Archive

Pluripotent Stem Cells Developmentally Immature
Researchers have discovered that though similar, induced pluripotent stem cells are similar to embryonic stem cells, but are much more developmentally immature.

Change the Environment, Not the Child
National study finds equal benefit for children with cerebral palsy.


August 17, 2011--------News Archive

Molecular Delivery Serves Gene Therapy Cocktail
Scientists have devised a gene therapy cocktail that has the potential to treat some inherited diseases associated with "misfolded" proteins.

Children of Depressed Mothers Have a Different Brain
MRI scans show their children have an enlarged amygdala.

Discovery Likely to Spur Medicine and Human Health
Scientists have gained new insight into the relationship between two proteins that, out of balance, can prevent normal development of stem cells in the heart.


August 16, 2011--------News Archive

Study Finds New Role for Protein in Hearing
A protein involved in sound sensing in the inner ear may also play a role in transmitting sound information to the brain.

Retinoblastoma Made of Hybrid Cells
Scientists settle a century-old debate about retinoblastoma's beginnings and identify new targets for treating the childhood eye tumor.

Can Oral Care for Babies Prevent Future Cavities?
A recent study confirms the presence of bacteria associated with early childhood caries (ECC) in infant saliva.


August 15, 2011--------News Archive

Slowing the Allergic March
Researchers identify a target that could combat allergies of early childhood.

Gene Clue in the Development of Rheumatoid Arthritis
Findings will help lead to personalized therapies for common, complex illnesses characterized by abnormal immune responses.

Sight Re-Constructs Moving Objects: One by One
Our visual system groups areas of the world with similar characteristics, such as color, shape, or motion.

WHO Child Growth Charts

The law of hydrodynamics - or how liquids act under pressure - can contribute to our understanding of how a cluster of embryonic cells can transform into an animal within the first 36 hours of development, according to research recently published in European Physical Journal Applied Physics.

Vincent Fleury is a researcher at the Paris Diderot University studying the early stage of development when embryonic cells first form a flat sheet of cells before folding into a U-shape, resembling a folded pancake. He demonstrated that the formation of a chicken’s head is a consequence of the collision between both vertical sides of the embryo flowing at constant speed towards each other.

This study captured for the first time on film highly accurate observations of how a chicken embryo evolves during its first two days of development, using time-lapse microscopy. Prior attempts relied on complex imaging techniques that were costly and not as accurate as direct filming. In this study, the embryo was first taken out of its shell, its yolk removed (as it is not needed in the first 48 hours) and it was kept under appropriate temperature conditions.

Previous developmental studies focused on studying each cell individually. In this study, however, the embryo was considered in its entirety. The physical properties of the early embryo are much like plasticine - a malleable material able to both hold its shape as well as "melt" under the right conditions. The study involved measuring the speed of all points of the embryo and its viscoelasticity in vivo. Combining this data with the biological parameters of the embryo (cells’ viscosity, thickness and overall size), the author created a model of the growing embryo’s movement.

He discovered that the mathematical formula describing magnetic fields could also be used to model the hydrodynamic flow of embryonic cells. When the two developing sides collide, the embryonic cells are subjected to forces much like those of two magnets meeting head on, resulting in the formation of the head.

These findings demonstrate that the head formation does not merely result from a series of discrete events activated by genetic switches. It also shows that chemical gradients are not the prevailing force responsible for movement of cells in early embryo formation, as had been previously thought.

These studies shed new light to on vertebrate development, and could ultimately provide some clues for scientists involved in regenerative medicines. Similar work on limb development is due to be published in the August issue of the European Physical Journal Applied Physics.