If you have stomach pain on the 55th day of pregnancy, there are several possibilities. The first situation, you need to consider the aura of miscarriage, early pregnancy is the fetus is not very stable stage is also the most likely to occur in the stage of miscarriage, if the pregnant woman is not resting well to carry out strenuous exercise or sex, and emotional instability, low progesterone and so on are prone to lead to the precursor of miscarriage, tummy ache and the uterus contraction has a relationship with the situation needs to be preservation of the fetus treatment. The second situation, during pregnancy the uterus will continue to grow with the growth of the baby, in the middle of this process there will be a pulling reaction, can also cause stomach pain. In the third case, if the pregnant woman has a bad diet during pregnancy and eats hard-to-digest or spicy and irritating food, it can also cause intestinal cramps leading to stomach pain.