It is normal to have a feeling of falling in the abdomen when you are pregnant, because after pregnancy, with the increase of pregnancy days, the uterus gradually increases, and when the pregnancy reaches or exceeds three months, the uterus moves out of the pelvis and expands forward. At this time, the placenta secretes a variety of hormones that gradually increase, especially estrogen and progesterone, which increase the sensitivity of the pregnant uterus and make it very easy to provoke the phenomenon of uterine contractions, such as vigorous exercise, after turning over and after urination and defecation, the uterus is prone to contraction, which is manifested as a feeling of falling abdomen. In this case, after resting in bed, most of them can make the falling sensation ease or disappear. If, after resting, the falling sensation does not ease or worsen, it is necessary to go to the hospital in time to clarify the cause so as not to delay the condition.