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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
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June 9, 2011--------News Archive

Hormone Test Helps Predict Success In IVF
Women with high levels of the hormone AMH produced more eggs for in vitro fertilization (IVF) procedures, and were more likely to have pregnancies.

Fragile X Protein Acts as Toggle Switch in Brain Cells
Research shows how the protein missing in fragile X syndrome – the most common inherited form of intellectual disability – acts as a molecular toggle switch in brain cells.


June 9, 2011--------News Archive

Early Light Refines the Brain’s Vision Circuitry
Light and sight are connected from the beginning.

Molecule Shared by Nervous and Vascular Systems
IRCM researchers show that a key molecule of the vascular system is essential for the formation of neural circuits.


June 8, 2011--------News Archive

Fetal Exposure to BPA Changes Uterus in Primates
Oral intake of BPA altered expression of HOX and WNT genes which are critical for uterine development.

Pregnancy Weight Gain Risks Fat Baby, Child, Adult
Women who gain too much weight during pregnancy tend to have newborns with a high amount of body fat, regardless of the mother's weight before pregnancy.


June 7, 2011--------News Archive

Exposure to BPA Has Been Underestimated
New research results indicate BPA accumulates more rapidly within the body than previously thought.

Pregnant Women Can Prevent Excess Weight Gain with Simple Steps
Women who did not self-weigh gained an average of 15.2 pounds.


June 6, 2011--------News Archive

Programming Disease by Gender
Excess maternal stress can program adverse health effects through multiple generations, especially in boys.

Birth Control Pill for Men On the Horizon?
But to make the pill a reality, research needs to show that the compound is safe, effective – and reversible.

Finding How Pre-gut Cells Become Focused
Research has outlined exactly how specific cells in sea-urchin embryos become the endoderm, the domain that eventually forms the gut.

Found, Genetic Mutation Causing Excess Hair Growth
Scientists in Beijing, China, have discovered a chromosome mutation responsible for a very rare condition in which people grow excess hair all over their bodies.

WHO Child Growth Charts

A new University of Missouri study shows that the exposure to the controversial chemical Bisphenol A (BPA) through diet has been underestimated by previous lab tests.

In the study, researchers compared BPA concentrations in mice fed a steady diet supplemented with BPA throughout the day, compared to the more common lab method of single exposure, and found an increased absorption and accumulation of BPA in the blood of mice.

This is the first study to examine concentrations of BPA in any animal models after exposure through a regular, daily diet, which is a better method to mirror the chronic and continuous exposure to BPA that occurs in animals and humans.

Cheryl Rosenfeld, associate professor in biomedical sciences and Bond Life Sciences investigator, is the corresponding lead author of the study published in Environmental Health Perspectives on June 6.

The authors continuously exposed the mice to BPA through their feed, which is considered the primary route of exposure to this chemical in animals and humans.

In previous studies examining the effects of BPA, mice were exposed to BPA only through a one-time administration. Following the exposure through the diet, a significantly greater increase in the active form of BPA, which is the greatest threat as it is the form that can bind to sex steroid receptors and exert adverse effects, was absorbed and accumulated in the animals.

"People are primarily and unknowingly exposed to BPA through the diet because of the various plastic and paper containers used to store our food are formulated with BPA," Rosenfeld said.

"We know that the active form of BPA binds to our steroid receptors, meaning it can affect estrogen, thyroid and testosterone function. It might also cause genetic mutations. Thus, this chemical can hinder our ability to reproduce and possibly cause behavioral abnormalities that we are just beginning to understand."

The study notes that more than 8 billion pounds of BPA are produced every year, and more than 90 percent of people in the United States have measurable amounts of BPA in their bodies.

"We believe that these mouse model studies where the BPA exposure is through the diet is a more accurate representation of what happens to BPA as the human body attempts to processes this toxic substance," said Rosenfeld.

"When BPA is taken through the food, the active form may remain in the body for a longer period of time than when it is provided through a single treatment, which does not reflect the continuous exposure that occurs in animal and human populations. We need to study this further to determine where the ingested BPA becomes concentrated and subsequently released back into the bloodstream to be distributed throughout the body."

The study, "Comparison of Serum Bisphenol A Concentrations in Mice Exposed to Bisphenol A through the Diet versus Oral Bolus Exposure," is available online starting June 6.

Funding from this study came from a National Institute of Environmental Health and Sciences challenge grant program that was established to investigate the biological effects of exposure to BPA.

Original article: http://www.eurekalert.org/pub_releases/2011-06/uom-etb060111.php