Angina: Chest pain or discomfort that occurs when the heart muscle does not get enough blood.

Chronic: A chronic condition is one that lasts a long time or recurs frequently.

Diagnosed: When a disease has been identified.

Fetus: A developing human from usually 2 months after conception to birth.

Gastrointestinal: Relating to or affecting the stomach and intestine.

Grams per deciliter: A gram is equal to the weight of 16 drops of water. It is about 1/40 of an ounce. A deciliter is equal to 1/10 of a liter. (A liter is a little bigger than a quart of fluid.)

Hematologist: A medical specialist who deals with the blood and blood-forming organs.

Internist: A specialist in internal medicine.

Intrauterine device (IUD): A birth control device that is inserted and left in the uterus.

Intravenous: Administered through a vein.

Liver: A large organ in the upper right section of the abdomen. The liver secretes bile and causes important changes in many of the substances contained in the blood.

Nonsteroidal anti-inflammatory drugs (NSAIDs): Used to relieve pain, inflammation, swelling, or stiffness from conditions such as arthritis, tendonitis, or menstrual cramps.

Postpartum: After giving birth.

Spleen: An organ in the abdomen that plays a role in the final destruction of red blood cells, filtration, and storage of blood.