T.,
Here's a funny little story...while out of state visiting family (at 8 months pregnant) we were all sitting around talking about how having sex can induce labor. Apparently my niece had tried it and it worked for her first child (not the second). We laughed at her suggestion because everyone has their own "old wives tales" about how to induce labor. Well, that night, my husband and I did have sex, not even thinking about what we had talked about that day. This was at about 1 am and I started having contractions at 3:45 am. Later that night we had a little baby boy (1 month premature)! Prior to that point I had had no false contractions or anything.
I believe that everything, including babies, comes in God's time, but this just makes you think! If you do decide to try anything, just be sure it's safe for you and the baby...I'm sure you'd make sure of that anyway.
M.