It is advisable for pregnant women not to use baby warmers, especially in early pregnancy. If pregnant women must use baby warmers, they should not stick them directly on their bellies and for too long. The use of baby warmers for pregnant women may cause the following hazards: 1. If pregnant women use baby warmers directly on their bellies or on their uterus, the overheated temperature may lead to uterine contractions, which may seriously cause premature birth and fetal malformations. 2. The maximum temperature of baby warmers on the market can reach about 60°C, and the average temperature is about 50°C. If pregnant women use high-temperature baby warmers for a long time If pregnant women use high temperature baby warmers for a long time, it will easily lead to fire-irritated red spots on the skin, which will also cause the local skin to become dry and the fire-irritated red spots to be purple-red, and it is difficult to recover. When pregnant women must use baby warmers, it is recommended that they avoid being close to the uterus and stick them on through their clothes.