The first menstrual flow after abortion is particularly low, if the volume is more than 1/3 less than the original menstrual flow, it is likely to be due to uterine adhesions caused by endometrial damage, which in clinical terms is a decrease in menstrual flow. It is recommended that oral medication can be taken, for example, you can take Yimouzuo capsule orally for 7-10 days continuously. If the next menstrual period has returned to normal, clinically it is not a big problem. If the volume is still low then it is advisable to have an ultrasound examination to find out the thickness of the endometrium. If the endometrial thickness is still very thin before menstruation, it is likely to be caused by incomplete adhesions in the uterine cavity. It is advisable to have a hysteroscopy 3-7 days after menstruation to separate the adhesions, if any, and to improve the menstrual flow.