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

Postnatal Depression Linked to Depression in Child
The effects of maternal depression on the likelihood of the child to develop depression may begin as early as infancy.

First Diagnostic Test for Hereditary Child's Disease
A breakthrough in genetic research has uncovered the defect behind a rare hereditary child’s disease that inhibits the body’s ability to break down vitamin D.

Walking, Sex, Spicy Food Favored to Bring On Labor
Near the end of pregnancy, some women take it upon themselves to try to induce labor, mostly by walking, having sex, eating spicy food or stimulating their nipples.


June 16, 2011--------News Archive

Effects of Premature Birth Can Reach Into Adulthood
Premature infants are less healthy, have more social and school struggles and face a greater risk of heart-health problems in adulthood.

Mouse Genetics Are A Resource For Human Genetics
Mouse gene knockouts will empower mammalian gene studies for a generation.


June 15, 2011--------News Archive

Taming the Molecule's Dr. Jekyll and Mr. Hyde
Two forms of a molecule are called enantiomers and can have radically different properties in biology. Thalidomide is a good example of how different forms of the same molecule can have disastrous consequences.

Fear Activates Young, Immature Infant Brain Cells
Fear burns memories into our brain, and new research by University of California, Berkeley, neuroscientists explains how.


June 14, 2011--------News Archive

Malnourishment - Pregnant or Lactating - Key to Diseases In Children
Study in primates establishes critical role that undernourishment in mothers-to-be and lactating females has in creating type 2 diabetes in offspring.

We Are All Mutants
The first whole-genome measure of human mutation predicts 60 new mutations exist within each of us at birth.

Canadian Women On Technology Used in Childbirth
This generation's choice of C-section does not reflect knowledge of the procedure's complications to mother and child.


June 13, 2011--------News Archive

Cell Division Linked to Oxygen Levels
Johns Hopkins reports that the MCM proteins, which promote cell division, also directly control the oxygen-sensing HIF-1 protein which controls cell division.

Many Genetic Keys Needed to Unlock Autism
Hundreds of small genetic variations are associated with autism spectrum disorders, including an area of DNA that may be key to understanding why humans are social animals.

Children Eschew the Fat - If Dad Says So
Dad's choice of where to eat could literally tip the scales on his children's health.

Mom's B Vitamins Lower Child's Colorectal Cancer
Mice born to mothers who are fed a diet supplemented with B vitamins are less likely to develop intestinal tumors

WHO Child Growth Charts

Mice born to mothers who are fed a diet supplemented with B vitamins are less likely to develop intestinal tumors, report scientists at the Jean Mayer USDA Human Nutrition Research Center on Aging (USDA HNRCA) at Tufts University.

Previous research in humans and mice suggests that B vitamins, particularly folate, play a role in the prevention of colorectal cancer. Using a mouse model of naturally occurring colorectal cancer, the USDA HNRCA scientists examined whether a mothers’ B vitamin intake impacts her offspring’s cancer risk. Mothers were fed diets containing supplemental, adequate or mildly deficient quantities of vitamins B2, B6, B12 and folate prior to conception through weaning after which all of the offspring received the same adequate diet.

“We saw, by far, the fewest intestinal tumors in the offspring of mothers consuming the supplemented diet,” says Jimmy Crott, PhD, senior author and a scientist in the Vitamins and Carcinogenesis Laboratory at the USDA HNRCA. “Although the tumor incidence was similar between offspring of deficient and adequate mothers, 54% of tumors in the deficient offspring were advanced and had invaded surrounding tissue while only 18% of tumors in the offspring of adequate mothers displayed these aggressive properties.”

The results were published online June 9 in the journal Gut.

Crott and colleagues associated the tumor suppression seen in the offspring of supplemented mothers with a protection against disruptions to the Wnt signaling pathway, a network of genes commonly altered in colorectal cancer.

“The strongest expression of tumor-suppressing genes in the Wnt pathway was in the offspring of supplemented mothers and the weakest was in the offspring of the mildly deficient mothers,” says first author Eric Ciappio, a PhD candidate at the Friedman School of Nutrition Science and Policy at Tufts.

“We attribute these differences in gene expression to epigenetics, modifications of DNA which are sensitive to environmental factors such as diet,” Ciappio continues. “In this case, changing maternal B vitamin intake had lasting epigenetic effects in offspring and may explain the differences in tumor incidence and aggressiveness we observed”.

It remains unclear whether maternal consumption of the four B vitamins could impact tumor development in humans.

“While evidence is beginning to accumulate to suggest that maternal consumption of supplements containing folate may afford some protection against childhood cancers in offspring, we don’t yet have the ability to determine whether the same holds true for cancers that normally present in the mid to late decades of life,” explains Crott, who is also an assistant professor at the Friedman School.

Crott adds, “Aside from the known protective effect of maternal folate against neural tube defects such as spina bifida, our results suggest that mothers consuming supplemental quantities of these B vitamins may also be protecting her children against colorectal cancer.”

This study was funded by a cooperative agreement with the Agricultural Research Service (ARS) of the United States Department of Agriculture (USDA).

Ciappio ED, Liu Z, Brooks RS, Mason JB, Bronson RT and Crott JW. “Maternal B vitamin supplementation from preconception through weaning suppresses intestinal tumiorgenesis in Apc+/1638N mouse offspring.” Gut. Published online June 9, 2011. DOI: 10.1136/gut.2011.240291

The Gerald J. and Dorothy R. Friedman School of Nutrition Science and Policy at Tufts University is the only independent school of nutrition in the United States. Original article: http://now.tufts.edu/news-releases/b-vitamins-mother’s-diet-reduce-colorectal-ca