Do you believe in preimplantation genetic diagnosis (ivf) when a woman has had 3 miscarriages and low quantity/quality eggs?

No: My answer is really predicated on my moral beliefs. Preimplanation genetics allows you to choose which baby to keep...The others basically get aborted. While i can certainly appreciate the desperation that recurrent losses can cause, i can't personally participate in that kind of activity. On a purely scientific level, it works fine. I just can't on a moral level. Hope that helps.

PGS: Can be possibly useful in such circumstances. It is however not always necessary— all depends on what the RPL work up revealed for possible causes of the miscarriages.

Depends: With few eggs or low quality eggs pgd may give you the answer but unless good quality genetically normal embryos are available the result may not help this can be complicated and requires very individual counseling.