The views expressed by me are for educational purposes only and do not establish a doctor patient relationship.
Thanks for your question.
There is no way to calculate prolactin level while being on Yaz or any birth control pill.
The test result will be affected.
Prolactin level will be falsely low.
Hence, it is better to stop yaz for at least 24 hours before doing the prolactin level.
OK, thank you.