Winter is an important stage for pregnant women to take good care of the fetuses and themselves. It is necessary for women to keep away from the factors which can cause the fetal abnormality in winter. Generally speaking, five factors can seriously affect the health of the fetuses. 

The first factor refers to hot-water bag or electric blanket. Pregnant women always do their best to keep the belly warm. Some people even apply a hot-water bag to the belly. However, according to the medical research, the fetuses are rather sensitive to the high temperature. The high temperature can even cause the fetal abnormality or abortion. When the electric blanket is operated, a kind of electromagnetic wave can be produced to threaten the physical health of the fetuses. According to the medical research, 75% of 1700 aborted accidents are caused in winter. Therefore, in order to maintain the physical health of the fetuses, pregnant women should not keep the belly too warm.

The second factor is the air pollution. As it is rather cold in winter, people like to isolate the house from the air outside so as to maintain the air inside the house warm. At the same time, the heating fee can be saved. However, the air inside the room can be seriously polluted. The medical research has proved that the air pollution inside the house is more serious than that outside the house, and the human health can be seriously affected. For example, the symptoms like choking sensation can be caused. Therefore, in order to alleviate the symptoms, people should purify the indoor air frequently. They can also put some green plants at home.

The third factor is frequent cold. In winter, the human immunity can be decreased seriously, and the risks of getting various diseases like flu and rubella can be seriously increased. These various diseases can seriously affect the physical health of fetuses. Take the flu as an example. The symptoms of flu can not only hurt the growing central nervous system, but also cause abortion and death. If women take medicines, the fetal abnormality can be caused. If women do not rake medicines, the diseases can be worsened. Therefore, it is necessary for pregnant women to enhance the immunity and prevent the diseases.

The fourth factor is the lack of folic acid. The lack of folic acid inside the body of a pregnant woman can seriously affect the normal brain growth of the fetuses. Therefore, it is necessary for women to supplement folic acid for themselves so as to prevent the hidden harm.

The fifth factor is the bad mood. The bad mood can increase the adrenalines and further affect the fetal development through the placenta. The bad mood can even cause the fetal abnormality of the fetal internal organs. Therefore, pregnant women should keep happy as far as possible in daily life.