draw (third-person singular simple present draws, present participle drawing, simple past drew, past participle drawn) (heading) To move or develop something. To sketch; depict with lines; to produce a picture with pencil, crayon, chalk, etc. on paper, cardboard, etc.
The fetal position might also help ward off conditions like Alzheimer's or Parkinson's: Recent research on animals suggests that your brain does a better job of clearing waste that can lead to these neurological diseases when you're sleeping on your side rather than on your back or stomach. This position's also good for pregnant women.
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).