Transitioning off progesterone injections

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I am currently taking the PIO injections daily and will be transitioning off them at 8 weeks to the vaginal suppositories. Has anyone had experience with this? I am a bit nervous because my fertility clinic discharged me at 8 weeks also. I am having blood work before, during, and after the transition to make sure my body is able to tolerate it.... any advice appreciated 🙂