Large congenital nevi form in the womb very early in development, within the first twelve weeks of pregnancy. They are caused by a defect during embryologic development. There is no known method of prevention. They appear in either sex, in all races, and on any areas of the skin.
I recommend that you have a carbon monoxide detector within 15 feet of each bedroom door, 10 feet is even better if you can afford more detectors. If two bedroom doors are 30 feet apart or less, then place one in the middle. If however they are more than 30 feet apart you will need more than one detector.
Likewise, if you have a gas clothes dryer, put an alarm in the laundry room. Place one in the garage, if you park your cars there. Wherever you have a solid fuel-fired appliance â anything that could produce carbon monoxide â you should also have a CO alarm. TOP 5 Highest Rated Carbon Monoxide Detectors. If you havenât found right carbon monoxide detector for your home, or are looking for a possible better option than the one you currently have, these are the top 5 highest rated detectors to help you decide. 1. First Alert CO600 Plug In Carbon Monoxide Alarm. 2. Kidde KN-COPP-B-LPM Battery-Operated Carbon Monoxide Alarm with Digital Display. 3. 4. ProTech 7035-SL Lithium Battery Powered Carbon Monoxide Alarm with Display. 5.