Progesterone

Hello, hoping for some help please. Had my day 21 progesterone blood test done this week and the results were 17. Dr says that this is normal and ovulation probably occured. I've looked online and now my head is mashed with different information. Anyone know if this is low/normal??

Thank you

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Thank you so much for replying. Such a relief that it's classed as normal. I'll relax now thank you xx