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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 in 1993 as a first generation internet teaching tool consolidating human embryology teaching for first year medical students.

Today, The Visible Embryo is linked to over 600 educational institutions and is viewed by more than 1 million visitors each month. The field of early embryology has grown to include the identification of the stem cell as not only critical to organogenesis in the embryo, but equally critical to organ function and repair in the adult human. The identification and understanding of genetic malfunction, inflammatory responses, and the progression in chronic disease, begins with a grounding in primary cellular and systemic functions manifested in the study of the early embryo.


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.
Content protected under a Creative Commons License.

No dirivative works may be made or used for commercial purposes.

 
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 on weeks 0 - 40 to follow fetal growth every two weeks
Google Search artcles published since 2007
 
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July 24, 2014------News ArchiveLatest research covered daily, archived weekly

Life-saving stem cells may be easier to create
Researchers have found a gene that could be key to developing stem cells — cells that can potentially save millions of lives as they are able to morph into practically any cell in the body.

July 23, 2014------News ArchiveLatest research covered daily, archived weekly

Sexual selection linked to placenta formation
Fish with placentas are smaller and less brightly colored than non-placental fish. Yet if natural selection favors showy displays such as the male peacock's tail, how has sexual selection worked for less attractive males and the opposite sex?

July 22, 2014------News ArchiveLatest research covered daily, archived weekly

"You are what your grandfather ate"
A new study shows that epigenetic effects are passed down from one generation to the next — through fathers — as well as mothers and finds that these effects may fade over time.

July 21, 2014------News ArchiveLatest research covered daily, archived weekly

One injection stops diabetes in its tracks
In mice with diet-induced diabetes — the equivalent of type 2 diabetes in humans — a single injection of the protein FGF1 is enough to restore blood sugar levels to a healthy range for more than two days and without side effects.

July 18, 2014------News ArchiveLatest research covered daily, archived weekly

Gene essential in embryos, toxic in adult cell division
A gene factor called NANOG is essential to pluripotency in the embryo as it implants in the womb. It also regulates cell proliferation in skin, epithelia cells, and the esophagus of adult organisms. In fact, blocking NANOG reduces division in tumor cells.

July 17, 2014------News ArchiveLatest research covered daily, archived weekly

Timing is not only ticking
Many animals exhibit segmentation in development. A classic example being the sequence formation of the backbone, linked to the ticking of a “segmentation clock” in the embryo. Max Planck researchers now discover the sound pattern known as the Doppler effect influences all segmentation in the embryo.

July 16, 2014------News ArchiveLatest research covered daily, archived weekly

An amazing 'switch' in our brains
An amazing "switch" may be available to shut off (and turn on?) signals that promote the generation of new nerve cells and survival of old ones.

July 15, 2014------News ArchiveLatest research covered daily, archived weekly

Reverse engineering brain circuits
In a new study, Brown University neuroscientists looked cell-by-cell at the brain circuitry tadpoles, and possibly other animals like ourselves, use to avoid collisions.

July 14, 2014------News ArchiveLatest research covered daily, archived weekly

Babies of healthy moms worldwide are similar
Babies' growth in the womb and their size at birth, especially their length, are strikingly similar the world over when born to healthy, well-educated and well-nourished mothers.

July 11, 2014------News ArchiveLatest research covered daily, archived weekly

Dad's ethnic origin influences child's birthweight
A father's ethnic background can influence a child's birthweight as much as the mother's ethnic background, a new study has found. Previous research had only shown that a mother's ethnic background can influence a baby's birthweight.

July 10, 2014------News ArchiveLatest research covered daily, archived weekly

Nuclear transfer best for creating stem cells
This finding could lead to improved avenues for developing stem cell therapies as well as a better understanding of the basic biology of stem cells.

July 9, 2014------News ArchiveLatest research covered daily, archived weekly

Schizophrenia gene affects brain cell development
While no single genetic mutation is known to cause schizophrenia, genomewide association studies have identified gene variations in the developing brains of mice that are more common in humans with schizophrenia than in the general population.

July 8, 2014------News ArchiveLatest research covered daily, archived weekly

Embryonic stem cells organize geometrically
About seven days after conception, something remarkable occurs in the clump of cells that will eventually become a new human being. They start to specialize or "differentiate" and display characteristics of their ultimate fate as one of the 200 or so cell types that exist in humans.

July 7, 2014------News ArchiveLatest research covered daily, archived weekly

Child life stress can leave lasting impact on brain
For children, stress can go a long way. A little bit provides a platform for learning, adapting and coping. But a lot of chronic, stress like poverty, neglect and physical abuse is toxic and can have lasting negative impacts.

July 4, 2014------News ArchiveLatest research covered daily, archived weekly

3-D view of brain's center of memory and learning
Researchers with Oregon Health & Science University's Vollum Institute have given science a new and unprecedented 3-D view of one of the most important areas in the brain — a receptor that allows us to learn and remember.

July 3, 2014------News ArchiveLatest research covered daily, archived weekly

How sperm bore into the egg
A key protein is discovered which sperm need to fertilize an egg. Before it can fertilize an egg, a sperm has to bore through the outer egg layer known as the zona pellucida. Despite decades of research, some of the mechanisms in this process were unclear.

July 2, 2014------News ArchiveLatest research covered daily, archived weekly

"Enhancer" gene region triggers cell pluripotency
Scientists from The University of Manchester have identified an important trigger that dictates cells change their identity and become pluripotent.

July 1, 2014------News ArchiveLatest research covered daily, archived weekly

Caffeine affects boys and girls differently in puberty
Caffeine intake by children and adolescents has been rising for decades, due to marketing to children as young as four. Despite this, there is little research on the effects of caffeine on young people.

June 30 2014------News ArchiveLatest research covered daily, archived weekly

Scoliosis and Marfans linked to rare gene mutations
Children with rare mutations in two genes are about four times more likely to develop severe scoliosis, curvature of the spine, than children with normal versions of those genes.

June 27 2014------News ArchiveLatest research covered daily, archived weekly

How nerves tell top from bottom - front from back
Neurons and axons have polarity which gives them direction in the body. Positioning is fundamental to any organism. All cellular structures must be precisely oriented in order to work accurately.

June 26 2014------News ArchiveLatest research covered daily, archived weekly

Limb regeneration: Do salamanders hold the key?
The secret of how salamanders successfully regrow body parts is being unravelled. For the first time, researchers have found that a protein path called the 'ERK pathway' must be constantly active in order for salamander cells to reprogram and regenerate body parts.

June 25 2014------News ArchiveLatest research covered daily, archived weekly

Unexpected origin for parts of nervous system
A new study shows that the parasympathetic nervous system, is formed differently from what we believed.

June 24 2014------News ArchiveLatest research covered daily, archived weekly

Key protein in embryo stem cell differentiation found
Proteins are responsible for the majority of cell functions. But as they interact transiently within complex networks, it is difficult to determine which ones are important. New research may have identified a simpler way to identify the critical ones.

June 23 2014
------News ArchiveLatest research covered daily, archived weekly

Dad's drinking affects son's response to alcohol
Even before conception, a son's response to alcohol can be shaped by his father's drinking to excess — but not the daughters of the same father.

June 20 2014------News ArchiveLatest research covered daily, archived weekly

Gene 'dark matter' controls embryo lung growth
Only about two percent of our genome converts into proteins. A much higher percentage is transcribed into RNA — sometimes referred to as "genomic dark matter." Given the vast amount of RNA, scientists believe it must impact fetal development.

June 19 2014------News ArchiveLatest research covered daily, archived weekly

Birth spacing matters in avoiding preterm births
Women with short birth spacing between their last delivery and their next conception have shorter pregnancies, risking preterm birth.

June 18 2014------News ArchiveLatest research covered daily, archived weekly

Ice Storm Project records maternal stress
A new study finds a link between prenatal maternal stress (PNMS) and the development of asthma and autism in children.

June 17 2014------News ArchiveLatest research covered daily, archived weekly

'Pill for Males' still not ready
"The Pill" for men will have to wait a while longer.

June 16 2014------News ArchiveLatest research covered daily, archived weekly

Red wine causes pancreatic abnormalities in fetus
New research suggests that although resveratrol improved blood flow through the placenta of macaque monkeys and protected against harmful aspects of obesity, it injured the fetal pancreas.

June 13 2014------News ArchiveLatest research covered daily, archived weekly

Wobble identifies amino acids in gene coding
Proteins are produced in cells based on the "genetic code" (or rules) found within DNA and RNA. When the genetic code is accurately translated, proteins are produced. This is a very precise process, because mistakes can be disastrous.

June 12 2014
------News ArchiveLatest research covered daily, archived weekly

A single DNA tweak leads to blond hair
A single-letter change in our DNA genetic code is enough to generate blond hair in humans. Howard Hughes Medical Institute (HHMI) scientists have pinpointed that change, common in the genomes of Northern Europeans, and shown how it regulates an essential gene.

June 11 2014------News ArchiveLatest research covered daily, archived weekly

Found: Essential circadian clock protein
This discovery may provide the basis for treating circadian clock disorders with their associated metabolic problems.

June 10 2014------News ArchiveLatest research covered daily, archived weekly

First steps to stem cells becomming 3 fetal cell layers
A research team has found the precise combination of mechanical forces, chemistry and timing to help stem cells differentiate into three germ layers, the first step towards developing specialized tissues and organs of a fetus.

June 9 2014------News ArchiveLatest research covered daily, archived weekly

How brain neurons sense chemical cue to cross-over
Symmetry is inherent in development. An embryo brain and spinal cord, like the rest of its body, organize into left and right halves as they grow. But a certain set of nerve cells do something unusual: they cross from one side of the brain to the other.

June 6 2014------News ArchiveLatest research covered daily, archived weekly

Why girl babies win in the battle for survival
Sexual inequality between boys and girls starts as early as the womb – but why this occurs could be a key to preventing higher rates of preterm birth, stillbirth and neonatal death among boys.

June 5 2014------News ArchiveLatest research covered daily, archived weekly

Sacrificing immature eggs for the greater good
A woman's supply of eggs is a precious commodity because only a few hundred will be produced throughout her lifetime and hopefully as free as possible from genetic damage.

June 4 2014------News ArchiveLatest research covered daily, archived weekly

How stem cells develop may help us fight obesity
The world has great expectations that stem cells will revolutionize medicine. But in order to exploit their potential, we need to understand how their development is regulated.

June 3 2014------News ArchiveLatest research covered daily, archived weekly

Rhythmic electric pulses teach brain to hear
Precise rhythms of impulses transmitted from cells of the inner ear, coach the brain how to hear.

June 2 2014------News ArchiveLatest research covered daily, archived weekly

New sperm poised to become any cell
In the body, a skin cell will always be skin, and a heart cell will always be heart. But in the first hours of life, cells in the new embryo become totipotent — they have the incredible flexibility to mature into skin, heart, gut, or any type of cell at all.

May 30 2014------News ArchiveLatest research covered daily, archived weekly

Egg and sperm require lifelong protection
The way the sex of an organism is determined may require lifelong maintenance, as retinoic acid signals can reverse a male germ cell to a female germ cell.

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