Hi Lisa,
It sounds like you are doing great! 73 pounds is a huge number, congratulations! My DOS was 7/17/2012 and I'm down 65 lbs. Things have really slowed down for me over the last month. At my 3mo appt they told me to expect the slow down and also the increased hair loss... It's almost at a scary level! They promised that at around 6mo the hair would start growing again, I sure hope so!
I started at 288 and hope to get down to around 140, so I've got about 85 to go. I'm hoping and working hard to reach my goal by my one year mark. I'm hoping to see how others have fared over a year. Best of luck to you and your sister!
Chris