Blankets and other soft items in your baby's crib increase the risk of both suffocation and sudden infant death syndrome, or SIDS. That might make you feel like you need to crank up the heat to keep your blanket-free baby warm, but if the room's too hot, it also increases SIDS risk, according to MedlinePlus. Your best bet is to implement strategies to keep your baby's room comfortable for you while you're wearing your regular clothes.
Replace drafty windows in your nursery. Cover old windows with plastic sheeting and install heavy drapes if new windows aren't in your budget. Caulk wide gaps to keep out drafts.
Clean your heating ducts and make sure they're open. Check that no carpets or furniture block the air vents and that heat flows freely into the room.
Cover your baby's mattress with sheets designed to hold heat. Use soft flannel sheets and make sure they're tight over your baby's mattress.
Move the crib away from the window.
Place a heating pad in your baby's bed. Turn it on a few minutes before your baby sleeps to warm up cold sheets. Remove the heating pad and check to make sure the mattress is just warm but not hot before you put your baby down.
Place a thermostat in your baby's room to measure the temperature. Keep the temperature between 70 and 72 degrees recommends Baby Center.