Menstruation is a normal physiological phenomenon of women, under normal circumstances, menstruation is regular, if the phenomenon of menopause, and accompanied by nausea, if the woman has a history of sexual intercourse or married women did not take contraception, the first thing to consider is whether it is the result of pregnancy, pregnancy will not menstruation during the entire pregnancy. In addition, the increase in estrogen after pregnancy will lead to edema of the mucous membrane of the gastrointestinal tract, so there will be nausea, it is recommended to go to the hospital in time to take a blood test blood HCG to find out if you’re pregnant, or through the urine HCG test to find out if you’re pregnant. If positive, it is best to do ultrasound, mainly to understand the location of the gestational sac, and at the same time in the clinic to exclude the possibility of hyperemesis gravidarum, through ultrasound can basically be clear corresponding diagnosis.