It's luck of the draw. I had it done like 4 times with my oldest, nada. With my second, I had it done twice. First time I lost my plug, second time I went into labor immediately.
Had it done like 3 times with my third, and nothing.
<blockquote><b>Quoting Expecting Emma:</b>" I had it done with my 1st 3 times at 1 cm and it never did anything. I am 3 cm and with be trying again. Did it work the 2nd time or still nothing?"</blockquote>
Yes. I was in labor the next day!! Totally worth it.