If the pregnancy is just detected and the pregnant woman has hidden pain in the stomach, it is mostly seen in the following cases: 1, after the pregnancy, the uterus enlarges and the ligaments are tense, so there can be slight abdominal pain, but it is often not very serious; 2, after the pregnancy, the fertilized egg is in bed, and some sensitive women may also have hidden pain in one side of the abdomen; 3, ectopic pregnancy, because the fertilized egg is in bed outside the uterine cavity. If the rupture of ectopic pregnancy occurs, the abdominal pain will be more serious, manifesting as tearing pain in one side of the lower abdomen; 4, pre-eclampsia, the progesterone content is not stable enough after the first pregnancy, prone to pre-eclampsia symptoms, which will also manifest as hidden pain in the stomach, should check the progesterone, if the progesterone content is low, it is appropriate to preserve the pregnancy.