Sudden Infant Death Syndrome remains the leading cause of post-neonatal mortality (under the age of one) in developed countries. The causes of Sudden Infant Death Syndrome have been puzzling and research is being conducted to solve this catastrophic problem. Having a child under the age of one makes me very concerned, along with any other parent(s) that the possibility of SIDS could affect any infant at anytime, SIDS does not discriminate. I am seeking to find the possible causes to Sudden Infant Death Syndrome so in the future deaths could be avoided. Researchers have studied the many possible causes of Sudden Infant Death Syndrome and four have been selected for this paper. The first study addressed the effects of an infant's sleeping position and other prenatal risks associated with Sudden Infant Death Syndrome (SIDS). The SIDS victims were matched with four control groups of the same gender, age and place of birth. The second study researched the possible correlation between the brain weights of SIDS victims at death to those infants that died of other causes, only when the brain had not been damaged. The study took place between the years of 1980 and 2003 within the same local population. In the third study medical and demographic characteristics where analyzed among infants that were 24 to 32 weeks gestation weighing 500 to 2500 grams of SIDS victims and non SIDS victims. The researchers attempted to find a correlation between the two groups of preterm infants.