Occasional fireworks during pregnancy is not a big problem, but it is not recommended to often set off fireworks, because fireworks will release irritating gases, including some harmful gases in the process of fireworks, pregnant women and the fetus may have a certain impact. 1. Harmful gases: fireworks emission into the air of sulfur dioxide, nitrogen dioxide and other harmful gases, pregnant women smell more may stimulate the respiratory tract, causing some respiratory symptoms, and even affect the fetus. 2. Safety: when setting off fireworks, pregnant women may not be able to move easily, avoiding the timely fall, and at the same time, if the quality of the fireworks is not pass, may produce explosions and so on, on the pregnant woman and the fetus to cause some harm. Pregnant women in their daily lives should reduce the adverse stimuli, develop good habits, healthy diet, do not smoke and drink, pay attention to warmth, and regularly go to the hospital for maternity checkups.