2mm of endometrium 28 days after abortion is serious, belonging to the endometrium is too thin. Abortion surgery will cause some damage to the uterine lining, just after abortion surgery for about a week the uterine lining in the 2 to 4mm is normal, with the prolongation of time, the lining of the uterus will gradually thicken, generally in the abortion of about a month the uterine lining should be in the 8 to 10mm or so. The endometrial lining of the uterus of 2mm in 28 days of abortion may be related to excessive surgical damage to the basal layer of the uterus or uterine cavity adhesions. Thin endometrium will affect menstruation, lead to amenorrhea, and even affect future fertility. Thin endometrial lining after abortion should also be examined for the presence of uterine adhesions, and if there are adhesions, it should be treated with timely hysteroscopic separation.