Whether a cold has any effect on the fetus at 36 weeks of pregnancy cannot be generalized, but needs to be decided according to the severity of the cold. A common cold is an infection of the upper respiratory tract, mostly viral, and is self-limiting, usually recovering in about 1 week, and does not affect the fetus much. Because the fetus is mature at 36 weeks and the placenta is a barrier, a common cold will not affect the growth and development of the fetus in the womb. However, if the cold is severe and accompanied by symptoms such as fever, cough, general weakness and sore bones, it may have some adverse effects on the fetus. The fever will increase the metabolic rate of the pregnant woman and increase the oxygen consumption, which will affect the fetal heart rate and cause the fetal heart rate to be too fast, and the prolonged fever may also cause the fetus to suffer from intrauterine hypoxia. If a pregnant woman coughs for a long time after a cold and coughs strongly, it may lead to premature rupture of the fetal membranes and cause preterm labor. Therefore, if a pregnant woman has a fever or cough after a cold, she should not take it lightly, but should seek medical advice to reduce the fever and stop the cough under the guidance of a doctor. In addition, pregnant women should drink plenty of hot water and eat a light diet to avoid catching a cold during a cold. Regardless of the age of the fetus, do not take medication on your own, but decide to take it under the guidance of a doctor to ensure the health of the fetus.