Occasional firecrackers in late pregnancy, generally speaking, the fetus will not have obvious harm and influence, such as often in the firecracker noise environment may lead to fetal restlessness or preterm labor and other hazards. 1. lead to fetal restlessness: late pregnancy fetal auditory nerves have been well developed, although in the stomach with the abdominal wall and amniotic fluid protection, but if a long time in the firecrackers in the noise environment will feel the external sound stimulation, firecrackers may lead to frequent fetal activity in the uterine cavity, the phenomenon of fetal restlessness, and even on the fetal hearing to cause a certain impact. 2. Premature birth: long stay in the environment of firecrackers in late pregnancy, the noise of firecrackers will lead to endocrine gland disorders, which will stimulate the uterus to contract, increase the incidence of preterm birth, jeopardize the health of the fetus. Occasional listening to the sound of firecrackers in late pregnancy does not have much effect, but it is recommended to avoid staying in a noisy environment for a long time, so as not to affect the fetus.