Analysis of the color and causes of ovulation bleeding Ovulation bleeding refers to the phenomenon of vaginal bleeding in women during ovulation. During ovulation bleeding, color changes can reflect possible causes. This article will start with different colors of bleeding and analyze the causes of ovulation bleeding. Color 1: Bright red. The bright red color of ovulation bleeding often represents fresh blood, which is usually caused by ruptured follicles. During ovulation, the follicles in the ovary rupture, releasing the egg. During this process, the blood vessels around the follicles may be damaged and bleeding may occur. If this occurs during ovulation