What is the difference between the symptoms before menstruation and the early pregnancy?

Symptoms such as abdominal distension and breast pain may occur before menstruation. Abdominal pain will not occur during early pregnancy. Menopause, positive urine pregnancy, nausea, lethargy, nausea, vomiting, general fatigue and skin pigmentation will occur. Suggestions: Folic acid should be supplemented in early pregnancy to prevent intrauterine neural tube defects.