Whether an infusion during pregnancy affects the fetus depends on the composition of the medication infused. If the infusion is given during pregnancy due to severe pregnancy vomiting, it will not affect the fetus because the drugs given intravenously for severe pregnancy vomiting are usually glucose and vitamins, which are nutritional supplements and therefore have no effect on the development of the fetus. If it is a cold during pregnancy and infusion, usually need intravenous drip antibiotics as well as antiviral drugs, if it is penicillin antibiotics or cephalosporin antibiotics, the impact on the fetus is also not significant. If the antibiotics are of other types, they may affect the development of the fetus, such as delaying the development of the fetus, or even causing malformation of the fetus. If a woman has any abnormalities during her pregnancy, she must go to the hospital and inform the doctor of her pregnancy. The doctor will exercise discretion and choose the drug that will have the least impact on the fetus and use it carefully after weighing the pros and cons. Do not avoid seeking medical attention for fear of using medications that may delay your condition.