12 weeks pregnant and still have pregnancy vomiting is generally normal. Early pregnancy most women will have nausea, vomiting and other early pregnancy reaction, most of the 4 weeks of pregnancy, 9 weeks of pregnancy is the most obvious, about 60% of pregnant women in the 12 weeks of pregnancy to reduce their own, 90% of pregnant women in the 20 weeks of pregnancy to reduce, and even about 10% of pregnant women can last the whole pregnancy, so after 12 weeks of pregnancy is still vomiting is generally normal. Pregnancy reaction blood HCG (human chorionic gonadotropin) high and low, changes in thyroid function, pregnant women’s mental overstress, anxiety, low economic level related to women during pregnancy need to physicians, family members of psychological guidance and support. If the pregnancy reaction during pregnancy is severe, causing obvious discomfort and poor mental health of the pregnant woman, she should consult a doctor in time and be hospitalized if necessary.