Hi,
I'm not sure on all the ins and outs here, but I believe it's much harder to freeze and thaw eggs than it is embryos, so you're likely to lose more.
I guess you have to try to balance your religious beliefs against medical reality - It's a big undertaking (emotionally, physically and financially) to go through IVF and I personally would not undergo GIFT if the success rate is so low. With regular IVF I have a ~40% chance of success and that is daunting enough!

There's definately no harm in getting a second opinion - hopefully you can find someone who can be a little more understanding of your beliefs. Bedside manner is important when you're going through all this.

All the best~~