Sorry you have been going through so much lately. I was pregnant at 41 with my 4th and delivered at 42 (Now I'm 51 1/2) and I developed POTS at age 49 1/2, but always wonder if I didn't have symptoms all along, especially after what happened after the last delivery and I ended up in the hospital for a week because of the terrible leg swelling --my legs had no shape to them and I couldn't walk (Was this a predictor of things to come?) I was totally deconditioned initially but finally felt great a couple weeks later at home. I had been on bedrest for 12 weeks prior to delilvery for premature contractions. I truly believe there is a hormonal connection to POTS (mine possibly perimenopause at this point)--and Dr. G at NIH agrees with me, he just doesn't know what it is exactly. I don't know how we manage to get through anyone's elses crisis when we are continually having our own, but we do! This board is wonderful for those of us with POTS.. I think we're the only ones that can really understand what each of us is faced with. I will hope that your next IVF is successful but don't wait too long to get onto an adoption list--the older you are, the older the child who is available to you for adoption.