It is normal to have no reaction on the 40th day of pregnancy. Early pregnancy reaction is closely related to the individual’s response to hormones as well as psychological factors, for example, if a woman is too emotionally stressed or has a deviation in her physique, her early pregnancy reaction may be obvious. In addition, it is also related to the function of gastrointestinal peristalsis, the secretion of gastric acid, as well as the sensitivity of the taste buds of a woman after pregnancy, and the pregnancy reaction is different for each individual with a different physique. In addition, the early pregnancy reaction is not an indicator to assess whether the embryo development is normal or not, there is no obvious early pregnancy reaction, in order to clarify whether the baby’s development is normal or not, you can go to the hospital to do ultrasound examination, observe the location of the gestational sac, size, morphology, and the gestational sac within the development of the fetal buds and the heart tube pulsation. As long as the development of the gestational sac is normal, it doesn’t matter if there is any early pregnancy reaction, so don’t worry too much. During pregnancy, you should have regular checkups and pay attention to the growth and development of the fetus in your body. At the same time, do not have psychological pressure, try to relax and keep happy. Eat a light diet, less cold, spicy and stimulating food. Eat often or eat more food containing folic acid, such as spinach, milk, animal liver, potatoes, tomatoes and so on. Do not overexert yourself and do not carry heavy loads or engage in strenuous exercise.