The most dangerous drug in the world: 'Devil's Breath' chemical from Colombia can block free will, wipe memory and even kill. 1  Scopolamine often blown into faces of victims or added to drinks.
To summarize, it appears the best position is left side, followed by right side. After 16 weeks it's best not to sleep on your back, and you probably won't sleep on your stomach. (One way to avoid sleeping on your back is to sew a tennis ball into the back of your pajamas; this works for people who snore, too).
Rule: Put your baby to sleep on her back. To help prevent SIDS, the American Academy of Pediatrics (AAP) recommends putting your child to sleep on her back until she's a year old. If your baby can flip over before that, you don't have to go in her room to turn her onto her back. But you should still wait a year before actually putting her down in her crib on her tummy. Rule: Support your infant's head