Pregnancy nausea usually starts around 6 weeks after menopause, but there are individual differences in the exact timing. The level of human chorionic gonadotropin in a woman’s body rises significantly after pregnancy, and large fluctuations in hormone levels can lead to early pregnancy reactions such as loss of appetite, nausea and vomiting. Most women will experience varying degrees of vomiting around 6 weeks of pregnancy, and after 3 months of pregnancy, as hormone levels stabilize, the reaction will lessen or disappear. However, individuals have different body types and different sensitivities to HCG, and there are differences in the timing of the onset of the pregnancy vomiting reaction. Some women experience vomiting around 5 weeks into their pregnancy, while others do not experience any significant vomiting throughout the entire pregnancy, all of which are normal. When pregnancy vomiting reaction should pay attention to eat a light diet, do not eat greasy, stimulating and indigestible food, eat small meals, such as severe vomiting can be under the guidance of the doctor to take vitamin B6 relief.