Washington: Kids who receive antibiotics throughout the course of their childhoods gain weight significantly faster than those who do not, according to new Johns Hopkins Bloomberg School of Public Health research.

Tallahassee: A baby’s first words are often Mamma or Dada, but new research by a Florida State University psychology professor delves into how children build on these early words to create a colorful vocabulary.

Washington: Low-income students who change schools frequently are at risk for lower math scores and have a harder time managing their behavior and attention in the classroom than similar students who stay in the same school, according to research published by the American Psychological Association.

Minneapolis: Stroke is very rare in children, but colds, flu and other minor infections may temporarily increase stroke risk in children, according to a study published recently in the online issue of Neurology, the medical journal of the American Academy of Neurology. The study also found routine childhood vaccines may decrease the risk of stroke.

Detroit: Teens who spend hours on the Internet may be at risk for high blood pressure, say researchers at Henry Ford Hospital in Detroit.

Rochester: The risk for hospitalization doubles for kids with asthma who are exposed to secondhand smoke, according to a study led by Mayo Clinic Children’s Research Center.