The time when miscarriage is most likely to occur is in the early stages of pregnancy, that is, in the first trimester. This is because the fetus is not particularly stable at this time and is easily influenced by external factors. In addition, pregnancy is a process of survival of the fittest, and poorly developed embryos will be eliminated through miscarriage in the early stages of pregnancy, so it is very easy to cause miscarriage at this stage. The risk of miscarriage can be increased if the pregnant woman is not well rested, emotionally unstable, or has low progesterone and is overworked. Therefore, it is recommended to pay proper attention to rest and not to have sex during the first trimester of pregnancy. In addition, if the vomiting reaction is particularly serious in the early pregnancy, it will also increase the risk of miscarriage, so you should eat a light diet, and if the vomiting is particularly serious, you should actively treat it.