1. A system comprising: a monitoring device dimensioned for placement on an infant, the monitoring device having a plurality of sensors for monitoring a sleep position, a change in the sleep position, a temperature, a change in the temperature, a carbon dioxide level, a change in the carbon dioxide level, a respiration, and a change in the respiration of the infant; and a processing unit coupled to the monitoring device, the processing unit capable of processing information from the plurality of sensors and performing an algorithm to identify a sequence of events, deduce a sleep state of the infant, and determine a risk level for sudden infant death syndrome (SIDS) based on the information, wherein the risk level includes a low risk, an increased risk, a moderate risk, or a high risk, wherein the low risk is identified when the infant has a supine sleep position, a normal body temperature, less than about 1% carbon dioxide levels, and normal respiration; wherein the increased risk is identified when the infant has a) a supine sleep position, a rise of ≧0.5° C. in body temperature, less than about 1% carbon dioxide levels, and normal respiration or b) a supine sleep position or a prone sleep position, a normal body temperature, less than about 1% carbon dioxide levels, and normal respiration; wherein the moderate risk is identified when the infant has a) a supine sleep position, a normal body temperature, between about 1% to about 3.9% carbon dioxide levels, and normal respiration, b) a supine sleep position, a rise of ≧0.5° C. in body temperature, between about 1% to about 3.9% carbon dioxide levels, and normal respiration, c) a supine sleep position or a prone sleep position, a normal body temperature, between about 1% to about 3.9% carbon dioxide levels, and normal respiration, or d) a supine sleep position or a prone sleep position, a rise of ≧0.5° C. in body temperature, between about 1% to about 3.9% carbon dioxide levels, and normal respiration; and wherein the high risk is identified when the infant has ≧4% carbon dioxide levels.