You are 39 weeks pregnant. You must know these labor signals: 1. Changes in the tocolysis period. As the pregnancy progresses, pregnant women often show symptoms of the \”tocolysis period\”. This period is characterized by fetal movements that decrease or become irregular, pregnant women feel particularly tired and sleepy, and may experience mild abdominal pain and nausea and vomiting. These are all signs that pregnant women are about to enter the labor stage. at this time