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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 SemestersFemale Reproductive SystemFertilizationThe Appearance of SomitesFirst TrimesterSecond TrimesterThird TrimesterFetal 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 HemispheresEnd of Embryonic PeriodEnd of Embryonic PeriodFirst Thin Layer of Skin AppearsThird TrimesterDevelopmental Timeline
Click weeks 0 - 40 and follow fetal growth
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December 2, 2011--------News Archive

Working Moms Multitask More Than Dads
Not only are working mothers multitasking more frequently than working fathers, but their multitasking experience is more negative as well.

Unlocking the Genetic Mystery of Sarcomas
Study uncovers potential targets for treating a disease affecting children and adults.

When Babies Wake, Cortisol Rises to Mom's Level
The hormone cortisol in adults rises and lowers according to stress. But in babies cortisol remains level following waking - and tunes in with mom's level.

December 1, 2011--------News Archive

Home Births – Then and Now
A comparison of home-birth trends of the 1970s finds many similarities – and some differences – related to trends in home births today.

Risk of Suicide In Pregnant Women, New Mothers
An analysis of new data highlights risk factors that could be targeted by interventions.

Addiction Damages PreFrontal Cortex
Brain structure-function impairment may be related to an inability to assess rewards and consequences, behavior associated with addiction.

November 30, 2011--------News Archive

Gene Puts Brakes On Breast Cancer Progression
Newly published research explores the role of gene in tumour suppression

‘Perfect Parent’ Not A Good Idea
Seeking perfection as a parent works better for dads than for moms.

Kindergarten Friendships Matter, Especially for Boys
High-quality friendships in kindergarten may mean that boys will have fewer behavior problems and better social skills in first and third grades.

November 29, 2011--------News Archive

Cleft Lip Corrected Genetically in Mouse Model
Scientists have successfully genetically repaired cleft lips in mice embryos specially engineered for the study of cleft lip and cleft palate.

Common Herbicide Creates Reproductive Problems
International researchers link exposure to atrazine – an herbicide widely used in the U.S. and more than 60 other nations – to reproductive problems in animals.

Environment and Diet Leave Imprints On the Heart
DNA methylation in the human heart has revealed the 'missing link' between lifestyle and health, and may indicate methylation creates the equivalent of 5, 6, 7 and 8 bases by modifying Cytosines across our entire genome.

November 28, 2011--------News Archive

Role of Nuclear Membrane Protein in Organ Growth
Scientists had thought B-type lamin proteins were vital to embryonic stem cells; but they are more critical to organ formation.

Hormone Hepcidin May Control Atherosclerosis
Hepcidin is a hormone produced by the liver and regulates iron transport. Blocking its production encourages macrophages to counter atherosclerosis.

Two Enzymes Stamp DNA with "Turn Off" Signal
Inside the cell nucleus, DNA is wound around spool-like proteins called histones. Two modifications in this attachment tell a portion of the DNA to be on or off.

WHO Child Growth Charts


The nuclear lamina lines the inner surface of the inner nuclear membrane (INM). It maintains nuclear stability, organizes chromatin and binds nuclear pore complexes (NPCs) in a growing list of nuclear envelope proteins (purple) and transcription factors (pink). Coutinho et al. Immunity & Ageing 2009

New research from a team led by the Carnegie Institute's Yixian Zheng indicates that, counter to expectations, B-type lamins are not necessary for stem cells to renew and develop, but are necessary for proper organ development.

The work is published in the November 24 issue of Science Express.

Nuclear lamina is the material that lines the inside of a cell's nucleus. Its major structural component is a family of proteins called lamins, of which B-type lamins are prominent members and thought to be absolutely essential for a cell's survival. Mutations in lamins have been linked to a number of human diseases. Lamins are thought to suppress the expression of certain genes by binding directly to the DNA within the cell's nucleus.

The role of B-type lamins in the differentiation of embryonic stem cells into all types of cells as determined by location, was thought to be crucial. The lamins were thought to use their DNA-binding and suppression abilities to tell a cell which type of cell development path to follow.

But the team—including Carnegie's Youngjo Kim, Katie McDole, and Chen-Ming Fan—took a hard look at the functions of B-type lamins in embryonic stem cells and in live mice.

They found that, counter to expectations, lamin-Bs were not essential for embryonic stem cells to survive, nor did their DNA binding directly regulate the genes to which they were attached. However, mice deficient in B-type lamins were born with improperly developed organs—including defects in the lungs, diaphragms and brains—and were unable to breathe.

"Our works seems to indicate that while B-type lamins are not part of the early developmental tissue-building process, while they are important in facilitating the integration of different cell types into the complex architectures of various developing organs," Kim, the lead author, explained. "We have set the stage to dissect the ways that a cell's nuclear lamina promote tissue organization process during development."

Other members of the team were Alexei Sharov and Minoru Ko of the National Institutes of Health, and Melody Cheng, Haiping Hao, and Nicholas Gaiano the of Johns Hopkins University School of Medicine.

This research was supported in part by the Intramural Research Program of the National Institute on Aging (AAS, MSHK) and the Howard Hughes Medical Institute.

The Carnegie Institution for Science (carnegiescience.edu) is a private, nonprofit organization headquartered in Washington, D.C., with six research departments throughout the U.S. Since its founding in 1902, the Carnegie Institution has been a pioneering force in basic scientific research. Carnegie scientists are leaders in plant biology, developmental biology, astronomy, materials science, global ecology, and Earth and planetary science.

Original article: http://www.eurekalert.org/pub_releases/2011-11/ci-sro112111.php