I wish you well. I, too, will be a first time Mum at 50 this October. Currently, I'm pregnant with twins and can't believe it's all happening.
We became pregnant with our first ivf try! And two weeks ago, we found out we are having twins. It's been a roller coaster ride to be sure. I'm just about through with my first trimester and am about to start telling people.
I will keep my fingers crossed for you in hopes that you will have just as easy of a time with it as I.