I called the MW from my first homebirth within 2 hours of my BFP! She only takes 4-5 mommas with the same due date month, so books up really fast. She told me in the past that some Moms call her before they even tell their husbands . Just got a confirmation from her this morning that we're "in" and she will call sometime this week to schedule our first appointment. If this is your first time, and a homebirth/birth center midwife is something you might want, get your calls into them right away for a consult!! You don't have to commit, but that way you leave all your options open.
My first pregnancy, I think we went in to see her around 6 -8 weeks for the consult to decide if it would be a good fit for us. Once we confirmed her as our MW, we scheduled for 10 weeks to go in for initial bloodwork, urine test and doppler heart beat check. I think that's how it happened at least? It was almost 4 years ago, so kind of hard to remember clearly. This article outlines pretty clearly what my MW visits were like: http://www.naturalbirthandbabycare.com/midwife-appointment.html
What I loved about it is that the visits were an hour long, so there was always plenty of time to bring all the questions we had and get answers for them. With all of the standard prenatal tests, she would give us a handout about them a visit or so before they were "recommended". Then when we came in, we would let her know if we had chosen to do the test or not. We declined pretty much all of them for various reasons, including the glucose tolerance test and all ultrasounds as the pregnancy was proceeding very well. Although this time around, I might end up wanting to get the one ultrasound to determine gender for planning and preparation purposes (especially for my 3 year old who is really attached to having a baby girl!).