Pregnant premenstrual symptoms will also have, such as breast swelling and pain, abdominal pain or leukorrhea increase and other symptoms. 1. Breast swelling and pain: women pregnant due to increased levels of estrogen and progesterone in the body, stimulating the development of mammary gland ducts hyperplasia, breast space congestion and edema, which will appear breast swelling and discomfort, similar to the breast swelling and pain before menstruation, belong to the normal physiological phenomenon. 2. Abdominal pain: when the fertilized egg is implanted in a woman’s pregnancy or when the embryo develops after pregnancy and stimulates the uterus to increase in size, slight abdominal pain may occur, similar to the abdominal pain caused by pelvic congestion before menstruation, but the pain is generally mild and does not require special treatment. 3. Increased leukorrhea: After pregnancy, due to increased hormone levels and metabolism, will lead to increased cervical glands and vaginal secretions, which will lead to increased leukorrhea, similar to the leukorrhea before menstruation. However, there is usually no odor or itching. Symptoms of pregnancy may occur before menstruation, but these symptoms are not exactly the same. Pregnancy may also cause menopause, nausea, vomiting, deepening of the color of the areola, and the presence of Montgomery’s nodes. A single symptom cannot determine whether it is pregnancy or premenstrual symptoms, and a combination of blood HCG and ultrasound is needed to clarify.