This is important to reduce risk of cot deaths. (medic8.com)
Be careful not to fall asleep due to the associated risk of cot death. (breastfeedingmums.com)
Publication of Proof that Later Babies in a Family Are More at Risk of Cot Death than First Babies (A Corollary of the Fact that Reuse of Mattresses Increases the Risk of Cot Death): «Risk factors of sudden infant death in Chinese babies», American Journal of Epidemiology 1997; 144:1070 - 73 (childbirthsolutions.com)