Will utrogestan cause light bleeding? I am 33 years old and trying to get pregnant with our 3rd baby. I never struggled with the first 2, but have recently experienced and early onset of bleeding, about a week before my menstrual period should start. My gynae suspects a mild case of endometriosis or that my uterus is calcifying earlier than it should. I was prescribed utrogestan, I havr had none of the usual early bleeding, and am now experiencing spotting/light bleeding. I have also tested for pregnancy but the result was negative (have tested 2 weeks after implantation). Could I be pregnant or is the utrogestan causing this lighter period? Have used it now for 2 weeks.