To PGD or not PGD ... that is the question?

I'm desperate for a quick answer to help hubby & I make a decision. We find ourselves in the realm of IVF/PGD as we are proving to be a particularly "stubborn" case of "unexplained infertility". It seems that the next step for us is to try PGD to see whether that will give us any answers about why our 6 transfers have failed.

We have 4 fertilised embryos from our most recent cycle and are trying to decide whether that is enough to justify spending the $2,500 for PGD. We got 9 day 5 blasts first time round so 4 fertilised is a bit of a disappointment for us. We don't suspect any genetic disorders, we're simply searching for answers for the lack of success. It is not critical that we do the PGD but we feel it is the next step.

We have the option of freezing this batch and doing another collection to get enough for it to be "worth" testing. I guess we have the luxury that we can still transfer an unscreened embryo? What should we do? What is the minimum/normal number of embryos that people in our situation have had tested?

Thanks in advance for any comments.

Hey, have you been tested for Natural Killer Cells? I don't know a huge about about this but a good mate of mine got tested for this because she had also had 6 failed transfers.
She didn't actually have any but her Dr tested a few other women in his clinic with high numbers of failed transfers and both of those women had huge levels of NK cells. He treated them and they are both now pregnant.

Just a thought. As I say, I don't know a huge amount about it but when people say they've had a lot of failed transfers for no apparent reason, I immediately think of this.

Good luck
Sue xx