Early pregnancy breasts suddenly do not swell and pain if the body hormone changes due to, is generally normal, if the fetus is caused by the cessation of labor, is an abnormal phenomenon. Early pregnancy women due to the increase in hormones in the body will appear chest swelling, nausea and vomiting, aversion to grease and many other uncomfortable symptoms. With the development of the fetus, the hormone level in the pregnant woman’s body gradually tends to stabilize, the symptoms of breast swelling will gradually reduce, so the early pregnancy of the woman’s breasts suddenly not swelling symptoms is normal. Early pregnancy chest suddenly not swelling pain may also be caused by fetal arrest, fetal arrest is complex and diverse causes, considered to be caused by the embryo, the mother, the father, the environment and many other factors. Patients may experience symptoms such as sudden disappearance of pregnancy reaction in early pregnancy, reduction or disappearance of breast swelling and pain, and a small amount of vaginal bleeding, which are abnormal phenomena. It may be normal for a patient to experience a sudden lack of breast swelling and pain in early pregnancy. However, it may also be caused by fetal deactivation, which is an abnormal phenomenon, and it is recommended that the patient consult a doctor in time to take treatment under the guidance of the doctor.