have you done the same protocol every time e.g Antagonist or Down reg or have you tried both?
what is this??? but i have written it down to ask my FS today , and BIG THANKYOU all for your kind words, fingers are crossed for all of you girls too!!!!
Have you used the same drugs in the same way each time?

For the long down reg protocol you start Synarel or Lucrin at 7dpo (or CD21) in the cycle before your IVF cycle and continue it until EPU (egg pickup). You may or may not have used BCP earlier that cycle. You start FSH (puregon or gonal-f) injections early in the IVF cycle and continue that until EPU too.

For an antagonist protocol, you don't start any drugs in the cycle before the IVF cycle. When your IVF cycle starts (with AF) you start FSH injections around CD1-4 and when the follicles reach a certain size you start the antagonist (eg Orgalutran) to prevent you ovulating before EPU.

In both cases you'd have a trigger (hcg - eg Ovidrel or Pregnyl) shot ~36 hours before EPU, then EPU, then transfer and then start progesterone (you might start progesterone between EPU and transfer for some clinics). You may also have hcg booster shots during the 2ww.

There's also another protocol (flare protocol) which has you starting Lucrin at the same time you start FSH injections.

So, essentially, the difference between all the protocols is the method of suppression (Synarel vs Lucrin vs Orgalutran) to prevent you ovulating before your EPU.

Lairdoz, I've done pregnyl booster shots (lower dose than for trigger) during the 2ww for two of my IVF cycles. My understanding is that our bodies metabolise hcg to produce progesterone and so it helps that way. I think there might also be a theory that it makes the body more receptive to an implanting embryo by making it think it's already pg (affects the uterine lining somehow). It's fairly common, I just don't understand why they do it that well.