If the gene is easy to isolate and find a probe for then it could take 10-12 weeks to do that part of the process. If it takes longer to find a probe that works, it will take longer. Then once they have nailed that bit you then have to book in for a cycle......do not expect to get in straight away to cycle like you do with normal IVF. With PGD they can only process a couple of peoples embryos through the labs each day because it is such a specialised process so you will be slotted in when they have a spot available. For example we booked in before Christmas to do a PGD cycle and were told there were no slots till the April cycle so basically you have to wait your turn. And you can't get on that waiting list till they have your probe sorted out...no point cycling if they are not going to be able to isolate the gene...... it is not a short process......
Ferrals, IMO, that is why I think it is a good idea to organise an appt with a FS at the clinic of your choice, even before you know for sure, what path is right for you, in Melb, I am on the wait list till end of August to get my frozen embryo transfered at my old clinic, as I don't want to use the other FS I used to use there.

If you start to slowly make appointments, and just pace your way through your own journey, you will be prepared for any delays hun

HTH