Progesterone blood tests ovulation

Jessica • TTC second child 👶 🤞🏼 4 💔

Hi I’m going to doctors appointment on 14th cd24 for progesterone blood test for ovulation just wondered if anyone has been through this before my hospital specialist made the appointment for me and I’m seeing her in fertility clinic in 3 months times any advice would help as I’ve not had this before thank u kindly 🙏 pic for attention 😉