Yes you can. The reason for not laying on your back is because it squishes one of your main arteries, but thats if you lay on your back for a long period of time, say to sleep. Having sex on your back is fine as long as it is still comfortable for you. Im 32 weeks along and my hubby and I still have sex in the missionary position, but only if I'm comfortable.
at 8:09 PM on Oct. 2, 2008