Whether the presence of effusion during pregnancy has any effect on the fetus needs to be analyzed on a case-by-case basis; if the amount of effusion is small, it is a normal physiological phenomenon and has no effect, while if the amount of effusion is large, it will have an adverse effect on the fetus. If the pregnant woman contains a small amount of fluid in the uterine cavity or pelvic cavity, it is a normal reaction and can be absorbed by itself in most cases, usually no treatment is needed and it will not affect the fetus adversely, and it should be rechecked regularly; however, if the amount of fluid gradually increases, or the pregnant woman gradually accompanied by abdominal pain or persistent vaginal bleeding, it will affect the fetus adversely, and the woman should seek medical advice and treatment in a timely manner. Pregnant women should eat more food rich in protein during pregnancy, and also need to properly supplement shrimp, fish, pork liver, oats, walnuts, peanuts and other foods, eat more fresh vegetables and fruits, to ensure that the intake of food nutritionally balanced, to avoid a single nutrient. During pregnancy, pay attention to more rest, at the same time should relax, avoid tension, anxiety, if the pregnant woman clearly has fluid, need to further examination, clear the cause of the disease, under the guidance of a professional doctor for treatment.