okay i called and asked my dr's receptionist when we go over the birthing plan and she asked someone else in the office and they said in the 3rd trimester. i called back asked her when that technically starts ( i know 7th month, but week wise when does that start?), but someone else told her that they go over it at 36 weeks! well i've HAD both my other ds's at 36 weeks! so i want to go over it either at next weeks apt or the one after that, i'm sure they'll be okay with that. but my question is when exactly does the 3rd trimester start week wise so that we are going over it in the third trimester?