Amniotic fluid at 30 weeks can be caused by a variety of things, such as fetal malformations or high blood sugar. If your stomach is hard, then you can’t rule out uterine tension or contractions caused by excess amniotic fluid. 1. Abnormal development of the fetus: If you have excessive amniotic fluid at 30 weeks of pregnancy, you should consider abnormal development of the fetus. For example, if the respiratory or digestive tract or the kidneys develop abnormally, since the absorption of amniotic fluid is accomplished by the above mentioned systems, and if there is an obstruction in these organs and they are unable to swallow the amniotic fluid, a large amount of amniotic fluid will be retained in the amniotic cavity and cause excessive amniotic fluid. 2. High blood sugar: It is also possible that the woman’s blood sugar is too high and not well controlled. In the case of high blood sugar, the blood sugar in the fetus also rises, which increases the production of fetal urine and may lead to the symptoms of amniotic fluid. 3. Contractions and uterine tension: If you have a hard stomach at 30 weeks of pregnancy, you may be experiencing contractions. It is not except that the amniotic fluid is too much, and the uterus is particularly large, so the clinical manifestation is a hard stomach, and this kind of hard stomach is not intermittent, it is always a lot of tension. Once in the 30th week of pregnancy with excessive amniotic fluid and a hard stomach, you need to go to the hospital for further examination to clarify the cause of excessive amniotic fluid and the cause of the hard stomach, and follow the doctor’s instructions for symptomatic treatment.