Beau, sorry, can't remember the costs. The compounding pharmacist I buy my DHEA from says if you can find the progesterone for less then $2 per pessary it's a bargain.

CayO, sorry to hear you didn't get the response you wanted. Not everyone gets lots of eggs and sometimes a few eggs can mean better quality than oodles of eggs. As for your question, I won't sugar-coat it for you - yes, there's a risk they won't survive to Friday. We had 6 embryos the time we tried for a 5dt and none of them made it past day 4, but we have quality issues due to our specific IF issues. I've seen other women with only 2 or 3 embryos have all of them make it to blast stage, so quality is a huge factor in the success rate.
I'm curious why you're booked for a transfer on day 4 though? That's very unusual. It's usually day 2/3 or day 5/6.