Welcome to The Visible Embryo

Home- - -History-- -Bibliography- -Pregnancy Timeline- --Prescription Drugs in Pregnancy- -- Pregnancy Calculator- --Female Reproductive System- News Alerts -Contact

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!




Pregnancy Timeline

Prescription Drug Effects on Pregnancy

Pregnancy Calculator

Female Reproductive System

Contact The Visible Embryo

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.

Return To Top Of Page
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
Search artcles published since 2007

September 27, 2012--------News Archive Return to: News Alerts

“These observations indicate a marked delay in the development
schedule of the human neocortex may play an important role
in the growth of connections that contribute
to our species-specific cognitive abilities,”

Dr. Chet Sherwood, George Washington University
Columbian College of Arts and Sciences

WHO Child Growth Charts


Human Brains Develop Wiring Slowly, Differing from Chimpanzees

Scientists comparing brain development in humans and chimpanzees see how quickly myelin grows in the cerebral cortex of humans

Myelin is the fatty insulation surrounding axon connections of the brain.

Research comparing brain development in humans and our closest nonhuman primate relatives, chimpanzees, reveals how myelin grows in the cerebral cortex of each species. Not only does this discovery shed light on the evolution of human cognitive development, but also the vulnerability of humans to psychiatric disorders, finds George Washington University professor Chet Sherwood.

Recent research by Chet Sherwood, associate professor of anthropology in the George Washington University Columbian College of Arts and Sciences, along with Daniel Miller, a former George Washington University graduate student, and other colleagues, reveals this key difference in brain development between human and chimpanzee.

The findings were recently published in the September 24th edition Proceedings of the National Academy of Sciences (PNAS).

In their article, Dr. Sherwood and co-authors write that the development of myelin from birth to adulthood in humans is protracted in comparison to chimpanzees.

In humans, myelin develops slowly during childhood,
followed by a delayed period of maturity beyond
adolescence and into early adulthood.

In contrast, in chimpanzees, the development of myelin starts at a relatively more mature level at birth
and ceases development long before puberty.

“These observations indicate a marked delay in the development schedule of the human neocortex which may play an important role in the growth of connections that contribute to our species-specific cognitive abilities,” wrote Dr. Sherwood and co-authors.

The developmental timing of myelination is important because it establishes connectivity among parts of the growing brain, which is essential to higher-order cognitive functions, such as decision-making and emotional regulation. These cognitive functions are known to mature relatively late in humans, after the time of adolescence.

The period of persistent myelin development
during early adulthood in humans is a time
of particular vulnerability to neuropsychiatric diseases,
including schizophrenia, bipolar disorder,
and depression.

The Columbian College
Established in 1821 in the heart of the nation’s capital, The George Washington University Columbian College of Arts and Sciences is the largest of GW’s academic units. It encompasses the School of Media and Public Affairs, the Trachtenberg School of Public Policy and Public Administration and more than 40 departments and programs for undergraduate, graduate and professional studies. The Columbian College provides the foundation for GW’s commitment to the liberal arts and a broad education for all students. An internationally recognized faculty and active partnerships with prestigious research institutions place Columbian College at the forefront in advancing policy, enhancing culture and transforming lives through research and discovery.

The George Washington University
In the heart of the nation's capital with additional programs in Virginia, the George Washington University was created by an Act of Congress in 1821. Today, GW is the largest institution of higher education in the District of Columbia. The university offers comprehensive programs of undergraduate and graduate liberal arts study, as well as degree programs in medicine, public health, law, engineering, education, business and international affairs. Each year, GW enrolls a diverse population of undergraduate, graduate and professional students from all 50 states, the District of Columbia, and more than 130 countries.

Original article: http://mediarelations.gwu.edu/human-brains-develop-wiring-slowly-differing-chimpanzees-george-washington-university-professor