(HealthDay News) -- Preeclampsia occurs when a pregnant woman's blood pressure spikes rapidly. It can lead to stroke, organ failure and other life-threatening conditions in both the mother and baby.

(HealthDay News) -- Although most babies spit up, forceful vomiting isn't normal and could be a sign of a digestive problem called pyloric stenosis.

SUNDAY, Feb. 6 (HealthDay News) -- High school students who work more than 20 hours a week at part-time jobs during the school year may be more likely to have academic and behavior problems, according to a new study.

THURSDAY, Feb. 3 (HealthDay News) -- Poor eating and activity habits, not genetics, are the underlying causes for most cases of adolescent obesity, new research suggests.

MONDAY, Feb. 7 (HealthDay News) -- Living in a connected community may protect poor teens from health risks such as smoking or obesity, researchers have found.

MONDAY, Feb. 7 (HealthDay News) -- Heart attack patients who are exposed to low-dose radiation from cardiac imaging and other procedures may have an increased risk of cancer, a new study finds.

MONDAY, Feb. 7 (HealthDay News) -- If you suffer from allergies, take heart: Researchers say you may be less likely to develop a tough-to-treat brain cancer, possibly because your immune system is on high alert.

MONDAY, Feb. 7 (HealthDay News) -- People who have dealings with the criminal justice system are at increased risk for suicide, even if they have never been found guilty or spent time in prison, a new study finds.

MONDAY, Feb. 7 (HealthDay News) -- The use of antipsychotic drugs to treat schizophrenia is associated with the loss of a small but measurable amount of brain tissue, a new study finds.

MONDAY, Feb. 7 (HealthDay News) -- Children who live with a relative after being removed from their home because of maltreatment have fewer behavioral and social skills problems than children in foster homes, finds a new study.

MONDAY, Feb. 7 (HealthDay News) -- A therapy to prevent heart failure is twice as effective in women as in men, a new study finds.

MONDAY, Feb. 7 (HealthDay News) -- Babies who were formula-fed and introduced to solid foods before they were 4 months old were more likely to be obese when they were 3, researchers report.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

MONDAY, Feb. 7 (HealthDay News) -- Almost 40 percent of young adults with autism get no medical, mental health or case management services to help them make the transition into adulthood, new research has found.

MONDAY, Feb. 7 (HealthDay News) -- Two-thirds of American children with attention-deficit/hyperactivity disorder struggle with other mental health and developmental conditions, such as learning disabilities and anxiety, a new study suggests.

MONDAY, Feb. 7 (HealthDay News) -- Smoking marijuana might trigger an earlier onset of psychosis, a new analysis of previously published research suggests.

MONDAY, Feb. 7 (HealthDay News) -- Feeding children lots of fatty, sugary and processed foods may lower their IQ, while a diet rich in vitamins and nutrients appears to boost it, British researchers say.

MONDAY, Feb. 7 (HealthDay News) -- The number of Americans having plastic surgery is bouncing back along with the economy, statistics released Monday suggest.

MONDAY, Feb. 7 (HealthDay News) -- Children whose mothers had higher levels of exposure to a substance found in a commonly used pesticide were more likely to get lower scores on a mental developmental test at 3 years of age than children whose mothers were exposed to lower levels or not at all, new research says.

MONDAY, Feb. 7 (HealthDay News) -- Increased sun exposure and higher vitamin D levels may help to protect against the risk of developing multiple sclerosis, a new Australian study suggests.