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).
1 Lie flat on your back and place baby on her tummy on top of you. 2  The requisite reminder: Do not leave baby alone during tummy time, and do not leave the baby on her tummy if she falls asleep. 3  Always place a baby to sleep on her back.