A slight stomach pain in the first trimester of pregnancy is a normal sign. In the first trimester, the uterus increases in size due to the enlargement of the fetus and shows a slight tingling or swelling sensation. This situation is also related to endocrine secretion, because the secretion of estrogen and progesterone increase in the first trimester, so it will show a ligament relaxation, showing a slight stomach pain, this situation does not need special treatment, try to pay attention to rest, do not overwork. However, if the pain is particularly severe, you should go to the hospital for a timely examination to determine if the pain is caused by an aura of miscarriage. If it is confirmed that there is an aura of miscarriage, you should take timely measures to protect the fetus, you can draw blood to check the progesterone, if the progesterone value is low, you can take oral progesterone or intramuscular injection of progesterone to protect the fetus.