Some women do not experience pregnancy vomiting after pregnancy, which is a normal phenomenon and is mostly caused by individual differences. After pregnancy, the level of HCG in women’s body increases and the level of other hormones also changes, which may affect the normal peristalsis of the gastrointestinal tract, causing nausea, vomiting or weakness and other early pregnancy reactions. The reaction to pregnancy vomiting is normal for some women, while some women have a mild reaction or even no reaction at all. Women who do not have vomiting reactions are mainly because they have a good ability to adapt to the rise of this hormone. Although there is no reaction to pregnancy vomiting, pregnant women may have other reactions such as frequent urination and swollen breasts. Pregnancy vomiting disappears on its own around the third month of pregnancy, when the placenta has basically formed and starts to secrete estrogen and progesterone needed for pregnancy, so the vomiting reaction disappears.