Hi! I did an initial hour in-office with a speech therapist, with several 30 minute followups on a live video link. It went very well, I think. (I plan on uploading some stuff on vocaroo for critique here.)
I had practiced for about 3 months beforehand using SingScope on an iPhone and the method Dena has mentioned here several times to 'tighten' the throat and move from the chest voice to a head voice. Once I was able to hold my speech in the A3-C4 range for several minutes, although with poor volume, I sought out a speech therapist through the Kaiser Northern California Multi-Specialty Transitions center.
Prior to my initial visit I was off dairy products for a few days, and didn't eat anything (but clear liquids) for several hours beforehand. A special camera and stroboscope was used to photograph my larynx and vocal folds in operation, with me trying to sing some notes with this hardware poking me!
Then we moved to Linda's office, where I read some passages and she evaluated my vocal spectrum. She was very happy with the pitch, so we moved right into breath control and prosody, the female singsong speech style in our culture. I recited a number of sentences with direction on emotional content, posture, head and mouth position. I got homework!
I spend the next several weeks reading aloud from Aesop's Fables, and speaking some of the longer passages 'spoken' by Hermione in the Harry Potter novels. I tried to use everything in conversations with other women. I tried to sing alto in church! (Ouch.) Each video session Linda engaged me in conversation and analysed my speech. I got fresh exercises.
I just "graduated" 6 whole days ago, and I do believe it worked. I had a blast doing it! Really! It was both a lot of work, and fun.