Which of the following is not a major risk factor for sudden infant death syndrome (SIDS)?

The correct answer is that exclusive breastfeeding is not a major risk factor for sudden infant death syndrome (SIDS). In fact, exclusive breastfeeding is often associated with a protective effect against SIDS. Research indicates that infants who are breastfed tend to have a lower risk of SIDS compared to those who are formula-fed. This protective benefit may be due to the various health advantages breastfed infants experience, such as a stronger immune system and reduced incidence of infections, which can contribute to a decrease in the risks associated with SIDS.

In contrast, the other options—prone sleeping position, maternal smoking, and overheating—are well-documented major risk factors for SIDS. Placing infants to sleep on their stomachs (prone position) is linked with an increased risk, as it can impair their ability to arouse from sleep or breathe properly. Maternal smoking during pregnancy or in the infant's environment is also a significant risk factor, as it can affect the infant's respiratory system and neurological development. Overheating is another established risk, as elevated temperatures can increase the likelihood of SIDS. Understanding these distinctions helps caregivers make informed decisions regarding infant care practices.