I understand your dilemma! Before, my clinic almost only did FET on natural cycles when women's body could cooperate (like yours). However, in April 2007, they went through some training at the most successful clinic in Canada, located in Calgary. They do medicated cycles only. Since they made the modifications, they upped their success rates *considerably*; the nurses told me they are impressed and see the difference already. But the changes to the protocol are quite impressive. First of all, the FET protocol is two cycles long. During your first cycle, nothing happens except:
- You start taking Suprefact and baby aspirin on day 21. Suprefact is considered better than Lupron because it achieves downregging just fine while being less aggressive on one's system. They also switched to Suprefact for IVF cycles.
- When AF comes, you start taking Vibramycin (antibiotics) for 7 days and Estrace (estrogen) in increasing doses until pregnancy test. At this point, Estrace helps you build a nice thick comfy lining, while after FET it helps implantation. Baby aspirin helps blood circulation, and given that your uterus is better irrigated, you increase implantation chances.
- On day 14 of that cycle, you have u/s. If your lining is 7mm or thicker, your transfer is scheduled to happen 3 days later. You start taking Prometrium (vaginal progesterone) two days before FET of course, stop Suprefact and continue Estrace and baby aspirin.
I, too, had a big shock when I saw all the meds I had to take. But, from personal experience, I know that following one follicle through ovaries that went through IVF meds before is not easy. Relying on the lining's thickness seems a little less iffy and maybe that contributes to higher success rates.
That being said, each woman is different. You medical history might make natural FET quite possible. If I were you, I'd ask my doctor to explain why he/she thinks that a medicated cycle is better, in general and for me.
Good luck on your FET!