Early pregnancy reactions refer to a series of physical reactions that occur in women in the early stages of pregnancy, such as vomiting, fatigue, nausea, changes in appetite, etc. Some people believe that the more severe the early pregnancy reaction, the better the quality of the embryo. However, this view is not unanimously recognized in the medical community. This article will discuss the relationship between early pregnancy reactions and embryo quality. First, early pregnancy reactions are caused by changes in progesterone levels. Early in pregnancy, the embryo produces a hormone called human chorionic gonadotropin (hCG). The level of hCG will gradually increase, causing early pregnancy reactions. However, no studies have found that the degree of early pregnancy reaction is directly related to embryo quality. The degree of early pregnancy reaction is affected by many factors, including individual differences, progesterone levels, and the psychological state of pregnant women. Therefore, the degree of early pregnancy reaction cannot be used as an indicator to evaluate embryo quality. Secondly, embryo quality refers to the morphological and genetic development status of the embryo. The quality of embryos is mainly determined by their appearance, cell number and chromosome structure. In assisted reproductive technologies such as in vitro fertilization and embryo transfer, doctors will select the best quality embryos for transplantation based on their quality. The relationship between early pregnancy reaction and embryo quality is weak, because embryo quality is mainly affected by the embryo\’s own genetic genes and developmental ability. In addition, the degree of early pregnancy reactions may also be affected by the pregnant woman\’s own health status and living habits. For example, factors such as diet, exercise, and sleep during pregnancy may affect the degree of early pregnancy reactions. Therefore, the degree of early pregnancy reaction cannot be used as the only criterion for judging embryo quality. [The most complete and best sound quality in history] 32 sets of 100 must-listen late-pregnancy music for free listening. Although the relationship between early pregnancy reaction and embryo quality is not clear, early pregnancy reaction itself does not have a negative impact on the embryo. Some studies have even found that pregnant women with severe early pregnancy symptoms may be more likely to maintain their pregnancy and reduce the risk of miscarriage. This may be related to the fact that the degree of early pregnancy reaction is closely related to progesterone levels. However, these findings need more scientific evidence to support. In summary, the degree of early pregnancy reaction does not directly reflect the quality of the embryo. Early pregnancy reaction is a normal physiological reaction, which is related to the physical condition and individual differences of pregnant women. Embryo quality is primarily determined by the appearance and genetics of the embryo. For people who want to know the quality of their embryos, they still need to obtain accurate information through medical examination and evaluation.