I personally don't believe in birth plans so I didn't do them. I did however have a few preferences which I discussed with my ob prior. I trusted my ob completely and trusted the midwives and him to offer me/do what they feel is right for me. I think you need to be prepared that things may not go to plan if you do have a birth plan. 3 births, 3 very different labours. I have no complaints with the midwives or my ob along the way.