What is the most common cause of sudden infant death syndrome (SIDS)?

The most common cause of sudden infant death syndrome (SIDS) is indeed related to sleep position and the allocation of the sleep environment. Various studies show that placing infants to sleep on their stomachs or sides significantly increases the risk of SIDS, while placing them on their backs is associated with a much lower risk. In addition to sleep position, other factors concerning the sleep environment—such as the presence of soft bedding, pillows, or loose toys in the crib—can also contribute to the likelihood of SIDS.

Recommendations by pediatric health organizations emphasize creating a safe sleep environment for infants, including using firm mattresses, avoiding soft bedding, and ensuring that the baby sleeps on their back. These guidelines have been instrumental in reducing the incidence of SIDS since their implementation.

While other factors such as infections, genetic predisposition, and respiratory issues may play a role in overall infant health and can potentially contribute to adverse outcomes, they are not the primary causes associated with SIDS. Thus, sleep position and the sleep environment are paramount concerns for preventing SIDS.