FET Natural cycle vs medicated cycle?

J

Please help. I’ve had 7 failed fet transfers - all unexplained because the embryos used were all tested and normal high scoring embryos from our retrieval’s.

Did anyone have any luck with natural cycle vs medicated? I’m so scared and nervous. I’ve tried both methods but nothing has worked. Preparing to try 2 embryos for the first time and medicated but am so scared. Please help with any stories or advice.