The phenomenon of nausea one week after ovulation, that in the ovulation intercourse, the first means that there is a great possibility of pregnancy, one week after nausea, that is considered to be mainly related to pregnancy or have some chronic stomach disease is related. It is advisable to go to the hospital to have a blood test for HCG to rule out pregnancy, and then use the right medication to treat it or adjust the menstrual cycle. If you are preparing for pregnancy, it is advisable to take some folic acid tablets orally to prevent fetal neural tube abnormalities, and to pay attention to eating less cold, spicy and stimulating food, and to go outdoors to exercise and increase immunity.