If you have black vaginal discharge when you are just pregnant, the amount is small, it will be clean after 2-3 days and there is no other obvious discomfort, then don’t worry too much, it is considered to be the bleeding caused by the fertilized egg implantation, it is a normal physiological phenomenon, it is recommended to take more rest to avoid heavy physical labor, light diet and relax. If the black discharge lasts for more than a week and the amount is high or accompanied by abdominal swelling and pain, it is recommended to consult a specialist as soon as possible and have the blood HCG, progesterone value, uterine ultrasound and other related examinations to determine whether there is a possibility of preterm abortion or ectopic pregnancy, the former should be actively treated with birth control, the latter can be treated with medication or surgery according to the specific situation. If there is a small amount of black vaginal discharge and regular contractions in the second trimester, it is considered that labor is imminent and it is recommended to prepare for delivery.