Low Progesterone levels can lead to various symptoms in women. Some common symptoms of low Progesterone include irregular menstrual cycles, heavy or prolonged periods, infertility, mood swings, anxiety, depression, low libido, fatigue, and breast tenderness. In some cases, low Progesterone levels can contribute to miscarriages or difficulty in conceiving. It is important to remember that these symptoms can be caused by other factors as well, so a Progesterone test and consultation with a healthcare professional are necessary to accurately diagnose and determine the appropriate treatment, if needed.