The first post-partum menstrual period with a large amount of blood clots may be a normal phenomenon, or it may be an abnormal phenomenon. 1. Normal phenomenon: due to the long period of pregnancy without menstruation, the endometrium may grow too thick, in the first postpartum menstruation, the endometrium may occur a large piece of flaking mixed, which leads to the menstrual volume is particularly large blood clots. If it is not accompanied by panic, weakness and other signs of anemia, there is no need to worry too much, and the menstrual blood can gradually return to normal. If necessary, you can also under the guidance of the doctor to take reasonable menstrual drugs, such as progesterone. 2. Abnormal phenomenon: there may be incomplete uterine regeneration, and the first time you have your period after delivery, you may have a large amount of blood clots. It is necessary to improve the examination to clarify the cause of the disease and take medication to promote uterine regeneration under the guidance of the doctor, such as motherwort. Mothers are advised to seek prompt medical attention if they feel unwell, so as to avoid any delay in their condition.