Louis Pellegrino MD


Chorionic villi of the placenta

Chorionic villi are tiny, branching growths found in the placenta. The cells of the chorionic villi have the same genetic material as the cells of the fetus.

Chorionic villi of the placenta

Chorionic villi are tiny, branching growths found in the placenta. The cells of the chorionic villi have the same genetic material as the cells of the fetus.

Vellosidades coriónicas de la placenta

Ilustración: Copyright 2000 Nucleus Communications, Inc. Todos los derechos reservados. http://www.nucleusinc.com Las vellosidades coriónicas son diminutos crecimientos con forma de dedo que se encuentran en la placenta. El material genético de las células de vellosidades coriónicas es el mismo que el de las células del…

ADHD: Impulsivity and Inattention

Impulsivity Impulsivity refers to acting without thinking first. Impulsivity in a person who has attention deficit hyperactivity disorder (ADHD) is highly likely to continue into adulthood. People with symptoms of impulsivity often: Are impatient with waiting their turn or waiting in line. Blurt out answers before…

Tourette’s Disorder

What is Tourette’s disorder? Tourette’s disorder is a brain condition that starts in childhood. Children with Tourette’s make sounds or movements—such as coughing or twitching—that they can’t control. These are called tics. Tics usually start at about age 2. They may be at their worst by age 12. Tics tend to decrease…