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).
Women should try to increase their sleep during the first trimester. Doctors at MayoClinic.com suggest adults get an average of seven to nine hours of sleep per night. Because pregnancy increases the demands on a womanâs body, especially during the first trimester, pregnant women may need more sleep.