I have been meaning to repsond to this thread for days but keep gettin sidetracked.
We are doing PGD as I have had 3 miscarriages now (all natural conceptions) with no apparent cause for them. yes it is expensive but it actually turned out to be the cheaper option for us. On our first cycle of IVF we got 17 eggs of which 12 feritilised and 10 made it to day 3 which is when they biopsy them. Now on a normal cycle all of those ten egg were deemed grade 1 awesome little suckers so we could potentally have had one transferred and frozen the rest. Only one of them passed PGD testing, meaning if we had not had the testing we would have forked out thousands on frozen cycles that were doomed to failure..financially we would have been worse off than ever.
So I guess I look at from the other side that it was beneficial to us..... only future cycles will show if there is pattern of dodgy embryos..hopefully it was just a one off and the next cycle gives us a ton of good ones!!!!

Oh and I second Meredith tip re Gavin Sacks...we actually flew to Sydney overnight in March and had his tests done which did show an autoimmune issue which also would prevent me carry a pregnancy...fortunately it is treatable now that we know it exists. I do not hesitate to reccomend a consult with him if you do decide to do PGD cos there would be nothing worse than forking out the extra $5000 if the "oven" aint working properly either. all we paid was the cost of the consult...the blood tests were bulk billed and as they say "knowledge is power" especially in this game!