I'm post-meno & was prescribed 100mg Utrogestan on a conti basis i.e. 28/28 rather than 25/28. Now on my 3rd trial of Utro in the hope of finding the right dose of oestrogen to go with it to prevent side effects that meant I had to stop the previous 2 trials. Like you, I'm also a migraineur, but have been lucky to have no episodes of classical migraine since post-meno (including whilst on HRT), though the ocular variant continued. I hope you get on well with it, those it suits seem to be very pleased with the outcome.