the cardiovascular system, and the hematologic system. Poor development of these systems increases the risk of infant mortality. Understanding the biological causes and predictors is important for identifying and preventing premature birth and infant mortality. While the exact mechanisms responsible for inducing premature birth are often unknown, many of the underlying risk factors are associated with inflammation. Approximately "80% of preterm births that occur at <1000 g or at <28 to 30 weeks of gestation" have been associated with inflammation. Biomarkers of inflammation, including C-reactive protein, ferritin, various interleukins, chemokines, cytokines, defensins and bacteria have been shown to be associated with increased risks of infection or inflammation-related preterm birth. Biological fluids have been utilized to analyze these markers in hopes of understand the pathology of preterm birth, but are not always useful if not acquired at the appropriate gestational time-frame. For example, biomarkers such as fibronectihn are accurate predictors of premature birth at over 24 weeks gestation, but have a poor predictive values before then. Additionally, understanding the risks associated with different gestational ages is a helpful determiner of Gestational age-specific mortality. This way, the rate of infant mortality in preterm births of gestational age above 26-31weeks are significantly lower compared to those under the same age. Sudden infant death syndrome (SIDS) Sudden infant death syndrome (SIDS) is a syndrome where an infant dies in their sleep for no known reason. Even with a complete autopsy, no one has been able to figure out what causes this disease. This disease is more common in Western countries. The United States Center for Disease Control reports SIDS to be the leading cause of death in infants age 1 month to 1 year of life. Even though researchers are not sure what causes this disease, they have discovered that it is healthier for babies to sleep on their backs instead of their stomachs. This discovery saved many families from the tragedy that this disease causes. Scientists have also discovered three causes within a model they created called "the contemporary triple risk model". This model states that three conditions such as the pregnant parent smoking while pregnant, the age of the infant, and stress referring to conditions such as overheating, prone sleeping, co-sleeping, and head covering. In the early 1990s, it was argued immunizations could attribute to an increased risk of SIDS; however, studies since then have proven otherwise and in fact support the