Progesterone Levels

Lauren • Married 🥂 Momma x2 to 🐶🐶 TTC #1 - IVF cycle #1 ✨ FET early December ❄️ Baby boy due August 2020 💙

I just had my progesterone level taken on CD21, and being 5DPO. I’ve read that normal levels in the luteal phase range between 10 and 20. Is this right? My level was 15.71. Is this okay? Sorry, I’m new to all of this fertility testing.