What is the leading cause of infant mortality in the United States?

Congenital anomalies are indeed the leading cause of infant mortality in the United States. These anomalies, which encompass various structural and functional abnormalities present at birth, can significantly impact an infant's health and likelihood of survival. They may include conditions such as heart defects, spina bifida, or chromosomal abnormalities, among others. These congenital issues often lead to complications either immediately after birth or later in life, contributing to increased mortality rates.

Infections, accidents, and respiratory distress, while serious and notable concerns in newborns and infants, do not account for as large a proportion of mortality as congenital anomalies do. Infections can lead to critical health threats, but advancements in prenatal care and immunizations have helped reduce these cases significantly. Accidents typically pertain to older infants and children, while respiratory distress, though a critical condition, can often be managed effectively with medical care. Thus, congenital anomalies stand out as a significant challenge in maternal and child health, leading to higher mortality rates among infants in the country.