Poor translucency of amniotic fluid at 38 weeks may be due to the presence of turbid amniotic fluid, which may be caused by physiological factors, fetal hypoxia, infection and other factors. 1. Physiological factors: in full-term pregnancy, there may be a mild turbidity, and the amniotic fluid will be poorly translucent and opaque during the examination, but there are no other clinical signs, the fetal movement is good, and the response of the fetal heart rate monitor is good, which is also a normal physiological phenomenon. 2. Fetal hypoxia: usually associated with a variety of factors, such as gestational hypertension, chronic hypoxia, etc., may lead to meconium into the amniotic fluid, there will be turbid amniotic fluid, may also be accompanied by frequent or reduced fetal movement and other abnormal manifestations. 3. Infection: for example, amniotic cavity infection syndrome, due to the presence of infection, will lead to amniotic fluid turbidity, may also be accompanied by increased body temperature, rapid heart rate, vulvar itching and other abnormal manifestations. The poor translucency of amniotic fluid at 38 weeks and the presence of other abnormal manifestations, it is recommended to do further examination to clarify the specific causes, timely treatment, so as not to jeopardize the health of the mother and child.