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Medical Genetics: Types of Genetic Changes The human body has about 20,000 different genes in each cell. Genes are located on chromosomes, which are stick-shaped structures in the middle of the cell (nucleus). Each cell usually has 46 chromosomes grouped in 23 pairs. Each gene

Preventing Eye Injuries in Children Eye injuries affect about 2.4 million people every year. Household products cause more than 125,000 serious eye injuries. Hospital emergency rooms treat nearly 23,000 victims of eye injuries from sports. Toys and home playground equipment cause

Exercise for Cancer Prevention People who are overweight or obese have a higher risk of getting certain cancers. This includes cancers of the: Breast (for people past menopause). Endometrium. Ovary. Kidney. Liver. Rectum. Esophagus. Colon. Pancreas. Stomach. Thyroid. Gallbladder

Heart Murmurs in Children What are heart murmurs in children? Heart murmurs are extra or abnormal sounds made by turbulent blood flowing through the heart. Murmurs are graded on a scale of 1 to 6, based on how loud they are. One means a very faint murmur. Six means a murmur that

The Third Trimester Prenatal visits during the third trimester During the second and third trimester prenatal visits, your healthcare provider may check the following things. Exactly what they check depends on your current health condition and the health of the fetus: Any current

Insect Stings and Allergic Reactions in Children Avoiding insect stings may not always be possible. But it's important to know how to respond if your child has an allergic reaction from an insect sting. This may give you more peace of mind if there is an emergency. Insect stings

Tree Nut Allergy Diet for Children General guidelines for tree nut allergy When your child has a food allergy, they must follow an allergy-free diet. This means your child can't have the food they are allergic to, or any products containing that food. The items that your child is

Planning a Pregnancy If you're planning to become pregnant, taking certain steps can help reduce risks for both you and your baby. Good health before deciding to become pregnant is almost as important as a healthy lifestyle during pregnancy. The first few weeks of pregnancy are

Stages of Alzheimer Disease Alzheimer disease is a type of brain disorder. It causes memory loss, confusion, and changes in personality, and gradual loss of independence. It is the most common type of dementia. At first, people with this disease have only a small amount of memory

Undescended Testes in Children What are undescended testes in children? Undescended testes means that 1 or both of the male testes have not passed down (descended) into the scrotal sac. This is a condition seen in some newborn baby boys. Most cases affect only 1 teste. About 1 in