Whether pregnancy tantrums have an effect on the fetus depends on the number of tantrums and their degree. If you lose your temper once in a while, it usually has no obvious effect on the fetus. 1, developmental delay: tantrums can make pregnant women in an unstable state, easy to make their adrenaline changes, thus affecting fetal growth and development; 2, intrauterine hypoxia: if pregnant women during pregnancy frequent tantrums, a long time can cause an increase in blood pressure, resulting in a decrease in the amount of blood supply to the umbilical cord and uterine vasoconstriction, which in serious cases can cause the fetus 3, preterm labor: late pregnancy temper tantrums too excited, may stimulate the uterus vaginal bleeding or early contractions, which may cause preterm labor; 4, preterm miscarriage: early pregnancy embryonic instability, while each organ system is in the sensitive stage of differentiation and development, excessive emotional fluctuations of pregnant women may cause embryonic arrest, which may lead to miscarriage; 5, congenital defects Disease: Long-term temper tantrums can lead to anxiety, depression and other negative emotions in pregnant women, which can stimulate the activity of the vegetative nervous system, thus causing changes in the secretion of acetylcholine and some hormones, and such substances can enter the fetus through the blood via the placenta and umbilical cord, easily leading to physical dysfunction of the fetus after birth, especially disorders of the digestive system. Therefore, during the whole pregnancy, if a pregnant woman is emotionally unstable, she needs to be relieved reasonably and her family should give psychological support and understanding. Pregnant women themselves need to learn to express negative emotions and choose appropriate methods to vent their negative emotions, such as singing, watching movies, and exercising appropriately. If you lose your temper regularly and cannot control yourself, you should actively seek psychological treatment to avoid adverse effects on the fetus.