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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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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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November 18, 2011--------News Archive

Increasing Uterine Development Genes Improve IVF
Increasing certain developmental genes at precise times in the uterus might improve pregnancy rates from in vitro fertilization-embryo transfers (IVF-ET).

“Silent” Strokes in Children with Sickle Cell Anemia
Silent strokes are the most common form of neurological injury found in SCA, with more than 25 percent of children with the disorder suffering a SCI by age six and nearly 40 percent by age 14.

Mystery Atom In Enzyme Critical for Life
All life requires the element nitrogen from the atmosphere to form amino acids and build proteins. But how to single out the atom in the middle of the process?

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

Breast-Milk Stem Cells!
Embryonic-like stem cells have been isolated from breast milk in large numbers.

All Mammals Share Common Brain Organization
Animal studies show that the outer layer of the brain – the cortex – is organized by genes which exhibit highly similar regional patterns between species.

3 p.m. Slump? A Sugar Rush Is NOT The Answer
Protein, not sugar, stimulates cells to keep us thin and awake, new study suggests

November 16, 2011--------News Archive

Delayed Cord Clamping Protects Babe from Iron Loss
Waiting for at least three minutes before clamping the umbilical cord in healthy newborns improves their iron levels at four months.

Mom's Brain More Damaged by Alcohol than Dad's
After only four years of problem drinking, a significant decrease in the function of the serotonin system in women's brains can be seen.

Regenerative Medicine
Engineered, Blood Vessels Reverse Anemia in Mice
System combining gene therapy with tissue engineering could avoid the need for frequent injections of recombinant drugs.

November 15, 2011--------News Archive

Parkinson's Greater if Exposed to Trichloroethylene
Symptoms of disease may appear 10 to 40 years following exposure.

Fetal Placental Stem Cells May Help Maternal Heart
Researchers have discovered the therapeutic benefit of fetal stem cells in helping

Pituitary-Like Tissue Grown From Mouse Stem Cells
Creating functional, three-dimensional tissue and organs from pluripotent embryonic stem cells (EScs) is one of the grand challenges of stem cell research.

November 14, 2011--------News Archive

Dyslexia Not Tied To Low IQ
Research on brain activity fails to support widely believed expectation that dyslexic students may have lower reading ability.

Intestinal E. coli Can Convert Sugar to Biodiesel Fuel
Biodiesel can be generated using E. coli as a catalyst, which will produce high volumes of the fuel with just a little tweaking of the bacteria's cell controls.

Cooked Food May Account For Human Big Brains
Harvard study finds an increase in energy from meat, suggesting cooking food was key to human evolution.

WHO Child Growth Charts

Factors such as low hemoglobin levels, increased systolic blood pressure, and male gender are linked to a higher risk of silent cerebral infarcts (SCIs), or silent strokes, in children with sickle cell anemia (SCA), according to results from a large, first-of-its-kind study published online today in Blood, the Journal of the American Society of Hematology (ASH).

Silent strokes are the most common form of neurological injury found in SCA, with more than 25 percent of children with the disorder suffering a SCI by age six and nearly 40 percent by age 14.

Strokes occur in patients with SCA as a result of low hemoglobin levels in the blood. Because hemoglobin is responsible for carrying oxygen to the blood, the body compensates for low hemoglobin levels by increasing blood flow to the brain, raising patients’ risk for brain injury, including these silent strokes.

“Young patients with a history of silent strokes have an increased risk of future overt strokes and new or increasingly severe silent stroke-related events, and have poorer cognitive function than children with sickle cell disease who have normal brain MRIs,” said Michael R. DeBaun, MD, MPH, first author and initiator of the study and Director of the Vanderbilt-Meharry Center for Excellence in Sickle Cell Disease at Vanderbilt University. “Children with silent strokes have a much higher risk of poor academic performance, and over the long term, we see a higher proportion of these young adults requiring special education or being retained in school.”

While silent strokes have been well documented in older adults, there has been limited research available to support clinical risk factors for silent strokes in children with SCA.

In order to assess whether previously identified risk factors for silent strokes in the general population—low hemoglobin, high systolic blood pressure, and male gender—were also associated with an increased risk of silent strokes in patients with SCA, investigators analyzed data from the international, multicenter Silent Cerebral Infarct Multi-Center Clinical Trial (SIT Trial).

The SIT Trial, which was supported by the National Institutes of Health (NIH) and the National Institute of Neurological Disorders and Stroke (NINDS), was designed to determine the efficacy of blood transfusion therapy for prevention of recurrent silent stroke events in participants with SCA.

In this cross-sectional study, investigators evaluated clinical history and baseline laboratory values and performed brain MRIs (to confirm silent stroke) in 814 children with SCA between the ages of 5 and 15 years with no history of overt stroke or seizures. Results from the data analysis showed that silent strokes occurred in one-third (251 of 814) of SCA patients enrolled in the trial.

Further analysis demonstrated that lower concentrations of hemoglobin, higher baseline systolic blood pressure, and male gender were associated with a significantly increased risk of silent stroke.

“This study confirms our original hypothesis that risk factors for silent strokes in the general population are also risk factors for pediatric patients with sickle cell anemia,” said Dr. DeBaun, also the JC Peterson Endowed Chair in the Department of Pediatrics at Vanderbilt University.

"With these results, we can focus our research efforts on strategies to prevent these silent strokes in children with SCA.”

Dr. DeBaun and colleagues are currently conducting additional research to determine if hydroxyurea, a treatment traditionally used to manage the pain episodes that occur with SCA, can also be used to prevent silent strokes in infants.

Kwiatkowski JL, Zimmerman RA, Pollock AN, et al. Silent infarcts in young children with sickle cell disease. Br J Haematol. 2009;146:300-305.
Bernaudin F, Verlhac S, Arnaud C, et al. Impact of early transcranial Doppler screening and intensive therapy on cerebral vasculopathy outcome in a newborn sickle cell anemia cohort. Blood. 2011;117:1130-1140; quiz 1436.
Reporters who wish to receive a copy of the study or arrange an interview with the authors may contact Claire Gwayi-Chore at 202-776-0544 or cgwayi-chore@hematology.org.

The American Society of Hematology is the world’s largest professional society concerned with the causes and treatment of blood disorders. Its mission is to further the understanding, diagnosis, treatment, and prevention of disorders affecting blood, bone marrow, and the immunologic, hemostatic, and vascular systems by promoting research, clinical care, education, training, and advocacy in hematology. The official journal of ASH is Blood, the most cited peer-reviewed publication in the field, which is available weekly in print and online.

Original article: http://www.hematology.org/News/2011/7237.aspx