Health Library

Hydrocephalus

A baby with hydrocephalus has extra fluid around the brain. This fluid is called cerebrospinal fluid (CSF). Too much CSF can increase the pressure in your baby’s head. This causes the bones in your baby’s skull to expand and separate. The baby's head may look larger than normal.

Hydrops Fetalis

Hydrops fetalis is severe swelling (edema) in an unborn baby or a newborn baby. It is a life-threatening problem.

Hyperbilirubinemia in the Newborn

Hyperbilirubinemia happens when there is too much bilirubin in your baby’s blood. Bilirubin is made by the breakdown of red blood cells. It’s hard for babies to get rid of bilirubin. It can build up in their blood, tissues, and fluids.

Hyperemesis Gravidarum

Many pregnant women have some nausea and sometimes vomiting in the first trimester. A few pregnant women have a severe kind of nausea and vomiting called hyperemesis gravidarum. Read on to learn more about this condition.

Hyperparathyroidism in Children

Hyperparathyroidism is when the parathyroid glands make too much parathyroid hormone. The condition is rare in children.

Hypocalcemia in the Newborn

Hypocalcemia is when a person doesn't have enough calcium in the blood. In babies, it’s called neonatal hypocalcemia. Your baby can get it at different times and from different causes.

Hypoglycemia in a Newborn Baby

Hypoglycemia is when the level of sugar (glucose) in the blood is too low. Glucose is the main source of fuel for the brain and the body. In a newborn baby, low blood sugar can happen for many reasons. It can cause problems such as shakiness, blue color to the skin, and breathing and feeding problems. Read on to learn more.

Hypoglycemia in Children

Hypoglycemia is when the level of sugar (glucose) in the blood is too low. Hypoglycemia can be a condition by itself. Or it can be a complication of diabetes or other disorder. Read on to learn more.

Hypoparathyroidism in Children

Hypoparathyroidism is when the parathyroid glands don’t make enough parathyroid hormone. The parathyroid glands are four tiny glands on the thyroid. The hormone they make helps manage levels of calcium in the bloodstream. Low levels of the hormone leads to low levels of calcium. This can lead to muscle spasms and cramping, called tetany.

Hypopituitarism in Children

Hypopituitarism means that the pituitary gland is not working normally. The pituitary gland is a pea-sized gland located at the base of the brain. It’s the master endocrine gland in the body. The pituitary gland normally releases as many as 8 different hormones. These hormones control growth, metabolism, blood pressure, and other body processes. The effects of hypopituitarism may be slow over time. Or they may be sudden.

Hypoplastic Left Heart Syndrome (HLHS) in Children

Hypoplastic left heart syndrome (HLHS) is a group of defects of the heart and large blood vessels. A child is born with this condition (congenital heart defect). It occurs when part of the heart doesn't develop as it should during the first 8 weeks of pregnancy.

Hypospadias in Children

Hypospadias is a problem where the opening of the urethra is not at the tip of the penis. With hypospadias, the end of the tube is lower down on the underside of the penis. Or it may be in the scrotum.