If you have brown discharge in the first trimester and no pain in your stomach, you need to go to the hospital for an examination or ultrasound to confirm the intrauterine status. Make sure there is no problem and then rest assured that there should not be brown discharge normally. A few pregnant women may be affected by endocrine secretion and have brown discharge, and need to rule out obvious abnormalities before they can feel at ease. It is best to have an ultrasound and gynecological examination, or check the progesterone value. If the progesterone value is normal, this condition is a normal sign. If there is a decrease in the progesterone value, it is not normal and there is a possibility of preterm abortion. Although there is no tummy pain, it is necessary to promptly carry out birth control, until the production of tummy pain has been very serious, and then the birth control may also affect the health of the fetus.