<Tr> <Td_colspan="2"> (edit on Wikidata) </Td> </Tr> <P> Sudden infant death syndrome (SIDS), also known as cot death or crib death, is the sudden unexplained death of a child less than one year of age . Diagnosis requires that the death remains unexplained even after a thorough autopsy and detailed death scene investigation . SIDS usually occurs during sleep . Typically death occurs between the hours of 00: 00 and 09: 00 . There is usually no evidence of struggle and no noise produced . </P> <P> The exact cause of SIDS is unknown . The requirement of a combination of factors including a specific underlying susceptibility, a specific time in development, and an environmental stressor has been proposed . These environmental stressors may include sleeping on the stomach or side, overheating, and exposure to tobacco smoke . Accidental suffocation from bed sharing (also known as co-sleeping) or soft objects may also play a role . Another risk factor is being born before 39 weeks of gestation . SIDS makes up about 80% of sudden and unexpected infant deaths (SUIDs). Other causes include infections, genetic disorders, and heart problems . While child abuse in the form of intentional suffocation may be misdiagnosed as SIDS, this is believed to make up less than 5% of cases . </P> <P> The most effective method of reducing the risk of SIDS is putting a child less than one year old on their back to sleep . Other measures include a firm mattress separate from but close to caregivers, no loose bedding, a relatively cool sleeping environment, using a pacifier, and avoiding exposure to tobacco smoke . Breastfeeding and immunization may also be preventive . Measures not shown to be useful include positioning devices and baby monitors . Evidence is not sufficient for the use of fans . Grief support for families affected by SIDS is important, as the death of the infant is sudden, without witnesses, and often associated with an investigation . </P>

4) what causes sudden infant death syndrome also called sids
find me the text answering this question