Chromosomal problems affect nearly all human embryos
... instability observed in vitro also occurs in spontaneous
pregnancies since, at most, 30% of human conceptions result in a live birth and more than 50% of spontaneous
abortions carry chromosomal aberrations. The high ... increase the live birth rate and decrease the spontaneous
abortion rate per embryo transferred.
Effectiveness of progesterone in reducing preterm births may be altered by genetic predisposition
... study author and SMFM member.
Women who have a spontaneous
preterm delivery are at greatly increased risk of ... to respond to 17P for the prevention of recurrent spontaneous
All patients had at least one prior spontaneous
preterm birth. The study extracted DNA from the ...
A novel X-ray source could be brightest in the world
... uses undulators to create bright x-ray beams of spontaneous
emission at the Advanced Photon Source (APS) at ... lasers has been concentrated on self-amplified spontaneous
emission (SASE), which would amplify the spontaneous
emission by a factor of a million or more in a ...
Eat chocolate, drink wine, add fun to life: SLU geriatrician shares secrets of staying young
... those who want to stay young to add a little SPF spontaneous
physical fun -- to their lives.
He advocates ... of the elevator or going dancing once a week.
physical fun is such a logical thing, and so ... you get older along with looking for ways to add spontaneous
physical fun into your life.
Use hormone ...
News tips from the Journal of Neuroscience
Astrocytic Ca 2+ Oscillations and Neurite Growth ... et al. explore the signaling pathway between spontaneous
Ca 2+ oscillations in cultured astrocytes and ... This molecule hydrolyzes IP 3 and thus prevented spontaneous
astrocytic Ca 2+ oscillations. Growth cone ...
Tracking down the causes of multiple sclerosis
... the disease. It would appear that B cells play an unexpected role in the spontaneous
development of multiple sclerosis and that particularly aggressive T cells ... has prompted surprising insights into the role of the B cells in the spontaneous
development of MS. This and the astonishing finding that particularly ...
Therapeutic cloning gets a boost with new research findings
... rise to a mammal's sperm or eggs, exhibit a five to ten-fold lower rate of spontaneous
point mutations than adult somatic cells, which give rise to the body's ... fetuses and cloned fetuses that are the same age have similar rates of spontaneous
mutation development. They attribute this finding to epigenetic ...
LSUSHC researchers find potential new target for hypertension treatment
... enzyme 2 (ACE2) helps preserve the function of a key spontaneous
reflex involved in blood pressure regulation and confirms its potential as ...
Beat-to-beat short term regulation of blood pressure is provided by a spontaneous
reflex called the baroreceptor reflex. Receptors in the arteries sense ...
Uncultured bacteria found in amniotic fluids of women who experience preterm births
... and inflammation.
Intra-amniotic inflammation is known to set off spontaneous
births of preterm babies at less than 32 weeks, said Yiping Han, associate ... or difficult-to-cultivate species may play a key role in initiating spontaneous
preterm births," said Han.
These bacteria either reach the placenta ...
IVF does not increase risk of developmental disorders in children
... although minimal hormonal support is still necessary in order to prevent spontaneous
ovulation. Ninety singleton babies born to sub-fertile parents who ...
The researchers studied the babies' neurodevelopment by assessing their spontaneous
movements, known as general movements, early in infancy. "The quality of ...
What scientists know about jewel beetle shimmer
... liquid crystal whose free surface has cone-like structures and that has a helical arrangement of molecules.
Research suggests the cells come from spontaneous
arrangement of glucose-like particles called chitin molecules that form as cones like those in a cholesteric liquid crystal. When these cones ...
Children's Hospital of Pittsburgh of UPMC scientists identify enzyme important in aging
... as pregnancy-associated plasma protein A (PAPPA). PAPPA-knockout mice live at least 30 percent longer and have significantly lower occurrence of spontaneous
tumors than typical mice.
PAPPA controls the availability in tissues of a hormone known as insulin-like growth factor (IGF) that is a promoter of ...
Women with endometriosis need special care during pregnancy to avoid risk of premature birth
... were delivered by Caesarean section," said Dr. Falconer. "We observed that among these women the risk of induced preterm birth was higher than for spontaneous
preterm birth. We believe that women with endometriosis are more frequently scheduled for preterm Caesarean section, possibly due to placental ...
Ovarian transplantation: First baby is born after a new technique
... menopause for eight and a half years before transplantation," said Dr. Piver. "But after transplanting half of the frozen ovary, she recovered spontaneous
ovulation in four months. Her right fallopian tube had been destroyed by the ovarian retrieval, and the function of the ovary and hence the chances ...
Ovarian transplantation: New technique gives greatly improved results in this delicate operation
... undergo a simpler procedure with equally successful results."
Out of the eight women who received cortical transplants, six have had one or more spontaneous
pregnancies, resulting in the birth of seven healthy babies.
"We are in the middle of a massive global infertility epidemic, caused by the new ...
New, less invasive genetic test greatly improves pregnancy rates in older women with poor prognosis
... patients. It is also likely to achieve a reduction in congenital abnormalities such as Down's syndrome, as well as a reduction in the frequency of spontaneous
The incidence of chromosomal abnormalities in human eggs is closely related to maternal age, and can affect more than 60% of all ...
Super-sleepers could help super-sizers!
... of re-awakening, increasing mitochondrial coupling does not seem to be a particularly good idea for animals that tend to exhibit short periods of spontaneous
arousal during the dormancy period, in some cases even daily. Burrowing frogs, on the other hand, are believed to remain deeply asleep during the ...
OHSU researchers study the idling brain
... continue to interact while a person is supposedly at rest sort of like a car that idles at a stoplight. Our lab is studying these interactions, or spontaneous
brain activity, while the brain is at rest. We think that this approach will eventually help us distinguish typical function from atypical function ...
Mouse model provides a new tool for investigators of human developmental disorder
... April 21, 2009, Cambridge, UK Wolf-Hirschhorn Syndrome (WHS) is a human disease caused by spontaneous
genetic deletions. Children born with WHS have a characteristic set of facial features, including a wide flat nose bridge, downturned mouth, high ...
Multiple route bone marrow stem cell injections show promise to treat spinal cord injury
... concluded Dr. Silva," that all of our patients with acute injuries improved significantly with no signs of deterioration or impediment of presumed spontaneous
According to Dr. Svitlana Garbuzova-Davis, a spinal cord researcher at the University of South Florida, the study highlights the value ...
Greatest thing since sliced bread: New data offer important clues toward improving wheat yields
... key for better quality of life for billions."
To conduct this analysis, the authors attempted to recreate the evolutionary events leading to the spontaneous
origin of bread wheat in nature. To do this, they crossed a diploid and tetraploid progenitor species and formed a synthetic strain of wheat in the ...
Researchers genetically link Lou Gehrig's disease in humans to dog disease
... very high levels of the SOD1 protein that can produce pathologic processes distinct from those occurring in ALS patients. Since the SOD1 mutation is spontaneous
in dogs, the clinical spectrum in dogs may represent more accurately that of human ALS.
"Compared with the rodent models for ALS, dogs with DM ...
A simple fusion to jump-start evolution
... is better, though efficiency drops again after reaching around 100) and the similarity of the fragment sequences.
The researchers note that this spontaneous
fusing, or ligation, would a simple way for RNA to overcome initial barriers to growth and reach a biologically important size; at around 100 bases ...
Practice as well as sleep may help birds learn new songs
... for how this works," said Margoliash. "At night, the auditory information that the bird was exposed to during the day is reactivated, [carried by the spontaneous
activity of neurons], changing the structure of the neural networks. These changes interact with changes during the day as birds listen to tutor ...
Orangutan's spontaneous whistling opens new chapter in study of evolution of speech
... December 11, 2008 Throughout history, human beings have used the whistle for everything from hailing a cab to carrying a tune. Now, an orangutan's spontaneous
whistling is providing scientists at Great Ape Trust of Iowa new insights into the evolution of speech and learning.
In a paper published this ...
December 2008 Geology and GSA Today media highlights
... The chemical and isotopic composition of the gas show that it is not associated with volcanic activity, a geothermal system, an oil field fire, or spontaneous
combustion of modern organic material incorporated in the slide. Pyrite (iron sulfide) and fine-grained carbonaceous matter (essentially small ...
First at-home test for vasectomized men proves to be safe, accurate
... Monitoring is important because vasectomies are not 100 percent successful, and men who have had them can experience recanalization, or the spontaneous
healing or restoration of the vas deferens, which restores their fertility.
"SpermCheck Vasectomy is similar in size and function to a women's ...
AGU journal highlights -- July 23, 2008
... about 85 km (53 mi) with uniform vertical resolution of 300 meters (980 feet) throughout the middle atmosphere. This GCM successfully simulates the spontaneous
generation of gravity waves by convection, topography, instability, and adjustment processes, as well as their propagation and dissipation, resulting ...
The aorta is torn apart in the Marfan syndrome
Marfan syndrome occurs at a frequency of between 1:5000 and
1:10000 and is either hereditary or the result of spontaneous
genetic mutations. As a consequence, there are changes in the consistency of connective tissue. Symptoms develop in the cardiovascular system, the ...
Researchers observe spontaneous 'ratcheting' of single ribosome molecules
... subunits move in relation to one another.
When Ha and postdoctoral fellow Peter Cornish observed the signal from the labeled ribosomes, they saw a spontaneous
back-and-forth rotation between the subunits even in the absence of the elongation factor, EF-G.
"Other researchers proposed that this rotation ...
What's bugging locusts?
... Since ancient times, locust plagues have been viewed as one of the most spectacular events in nature. In seemingly spontaneous
fashion, as many as 10 billion critters can suddenly swarm the air and carpet the ground, blazing destructive paths that bring starvation and ...
Programmed death boosts business
... known in biological circles as apoptosis, is a natural process in which damaged, diseased, or otherwise unwanted cells are stimulated to undergo spontaneous
self destruction. Apoptosis is a very useful process. Under normal conditions, it models the foetus, allowing growing fingers to separate for form ...
T-cadherin affects blood vessel growth in breast cancer, hormone from fat cells may play a role
... have led a team that developed the first living model to study this proteins effect on tumor angiogenesis by creating a strain of mice that develops spontaneous
mammary gland tumors in the absence of T-cadherin. Their results appeared March 1 in Cancer Research.
Evidence of T-cadherins role in ...
Fire without smoke
... NOx, or nitrogen oxides.
In flameless combustion, the oxidation of fuel occurs with a very limited oxygen supply at very high temperature. spontaneous
ignition occurs and progresses with no visible or audible signs of the flames usually associated with burning. The chemical reaction zone is quite ...
CSHL scientists part of team that discovers role of rare gene mutations in schizophrenia
... mutation-screening method in studies involving a greater number of patients and in other illnesses. Among other things, he seeks to determine whether spontaneous
mutations play as significant a role in schizophrenia as they do in autism, as revealed by a study he co-authored a year ago with CSHL Professor ...
Less can be more, for plant breeders too
... While this trait would be harmful to a wild rice plant, breeders use this genetic trick for hybrid seed production. Originally identified as a spontaneous
mutant in a japonica rice variety, the eui1 mutation was introduced into indica varieties by several years of breeding. With an artificial miRNA ...
New insights into the diversity of Creutzfeldt-Jakob disease agents
... disorders characterized by accumulation of an abnormal isoform (PrPSc) of a host-encoded protein (PrPC) in affected tissues. Although considered a spontaneous
disorder, the clinicopathological characteristics of sporadic Creutzfeldt-Jakob disease (sCJD) are variable and substantially influenced by a ...
Remarks Prepared for Delivery By Attorney General Michael B. Mukasey At the Ministerial Press Conference
... to join you today for the initialing of
the bilateral agreement between Germany and the United States that permits
access to biometric data and spontaneous
sharing of data about known and
This is a great achievement, both for its practical benefits and for
what it symbolizes. ...
Science, not romance, controls mating at Smithsonian's National Zoo
... This Valentines Day, Cupid wont be making a stop at the Smithsonians National Zoo. Unlike the spontaneous
attraction that most humans equate with love and romance, mating and dating at the National Zoo is planned, strategic and science-basedquite an ...
The birth and death of dopamine neurons: A new model for neurodegeneration
... of dopamine neurons. Mice with only a single copy of the foxa2 gene acquire motor deficits and a late-onset degeneration of dopamine neurons. This spontaneous
cell death preferentially affects neurons associated with Parkinson disease. This work provides new strategies to generate neurons in the laboratory ...