I. What are the causes of pregnancy vomiting? 1, the pregnant woman’s body hormonal changes suddenly, pregnant women can not afford this change, so the phenomenon of pregnancy vomiting. 2, pregnant women vomiting is the fetus in the protection of their own rejection behavior, because the pregnant women may eat some things is not conducive to the development of the fetus. So the fetus makes secretion of hormones to stimulate pregnant women to produce vomiting, so that they can reduce the intake of harmful nutrients. 3, the appearance of pregnancy vomiting, is in means that pregnant women need to properly adjust their eating habits. After pregnancy, the diet needs to be light, and can not eat more fried, greasy, spicy and stimulating food, otherwise it is very detrimental to the development of the fetus. 4, pregnant women are less active, more likely to have pregnancy vomiting. So you can do some exercise during pregnancy, and it does not mean that pregnant can not work, can not do housework, appropriate busy work for the body is good for the normal development of the fetus. 5, pregnant women do not sleep well, more prone to the phenomenon of pregnancy vomiting, therefore, after pregnancy to maintain adequate sleep time every day. 6, usually easy to seasickness, seasickness of women, pregnancy is more likely to pregnancy vomiting phenomenon.