I remember feeling changes by one month on the protocol, maybe sooner. My breasts gradually grew in size and initially felt sore. It was really exciting! They stayed the larger size throughout the Yasmin/Dom part and then grew even more when I started pumping/herbs. They are back to being sore now too, especially if I need to pump. The long months on Yasmin can be just that...long. But I guarantee you it is SO worth it when you start pumping and see your output go from drops to ounces! Best of luck to you.