Pregnancy nausea is considered to be early pregnancy reaction, early pregnancy reaction most women for about 12 weeks to disappear, individual women shorter or longer duration. Early pregnancy is affected by hormones, most women will have early pregnancy reaction, such as nausea, vomiting, appetite changes, etc. Through clinical observation, most women in the menopause 12 weeks or so early pregnancy reaction can disappear or relieve, may be with the blood HCG level drop or other hormone level changes have a certain relationship. Individual women due to different personal lifestyles, as well as different degrees of sensitivity to hormones, early pregnancy reaction lasts for a shorter or longer period of time, some of which slowly disappear after 8 weeks of gestation, while others may exceed 12 weeks of gestation, or even maintain the entire pregnancy. Early pregnancy reaction is a physiological phenomenon, most women’s symptoms are not obvious, a small number of women with serious symptoms should consult a doctor in time, if necessary, should take medication.