Perinatal loss is defined as the death of an infant due to miscarriage, stillbirth, and neonatal death.
Miscarriage as defined by the American Pregnancy Association is a pregnancy that ends within the first 20 weeks of gestation. Miscarriage is the most common type of pregnancy loss, according to the American College of Obstetricians and Gynecologists (ACOG)
A stillbirth is the death of a baby before or during delivery. A stillbirth is usually defined as loss of a baby after 20 weeks of pregnancy.
Stillbirth effects about 1% of all pregnancies, and each year 24,000 babies are stillborn in the United States.
SIDS is defined as the following:
"The sudden death of an infant under one year of age which remains unexplained after thorough case investigation, including performance of a complete autopsy, examination of the death scene, and review of the clinical history".
There are about 4,000 sleep-related infant deaths that occur each year in the US.