I was undergoing fertility treatment for last 3 months & was taking Letrozole ane Duphaston. Last month my period had come on 27th April. It was last cycle of treatment. Then after 27th april, in this new cycle I have not taken any medication. And suddenly on day 14 I got bleeding. On day 1 of bleeding when went for TVS scan found 'Adenomyosis of uterus'. In the day 2 when I did TVS scan again, then report came normal. After that when I started taking duphaston from day 3 of bleeding, it is stopped completely. I am confused. What is the reason of this mid cycle bleeding? This is the first time happened with me.