Before a woman becomes pregnant, there are usually no signs, while after pregnancy there will be some early pregnancy reactions, such as nausea, vomiting, acid reflux, breast swelling and pain and other symptoms. Women usually have no obvious symptoms before pregnancy, when women have intercourse about two weeks after nausea, vomiting, acid reflux, breast swelling and pain, frequent urination, constipation, dizziness, fatigue and other early pregnancy reactions, usually lasts for about 12 weeks of pregnancy will gradually reduce or disappear. If nausea, vomiting is serious or even unable to take in water, it will cause dehydration, acidosis and other phenomena, and develop into severe vomiting of pregnancy, need to go to the hospital in time, under the guidance of the doctor to correct the treatment of acidosis and so on. Women of childbearing age pay attention to personal hygiene, maintain a good mood, avoid staying up late. According to their own needs, good preparation for pregnancy or contraceptive measures to avoid unwanted pregnancy. Delayed menstruation suspected pregnancy need to go to the hospital in time, by professional doctors to give a clear diagnosis.