Postpartum sutures generally need 1-6 months to be absorbed, based on the nature of the suture and the healing of the patient’s wound, the time difference may be greater, there are the following kinds of cases: First, non-absorbable sutures: sutures can not be absorbed, generally in the healing of the incision after the removal of the suture; Second, absorbable sutures: divided into sheep intestinal thread, natural absorbable thread and synthetic absorbable thread, as follows: 1, sheep intestinal thread: and divided into ordinary sheep intestinal thread and chrome sheep intestinal thread. Divided into ordinary sheep intestinal line and chrome sheep intestinal line, ordinary intestinal line can be absorbed in about a week’s time, but there is a lack of tension, not easy to suture knot, absorption effect is not ideal, the reaction of xenophobia and other problems. Chromium gut line absorption time is longer, it takes about 1 month, the adverse reaction is lighter than ordinary gut line; 2, synthetic absorbable line: absorption time is longer, it takes 3-6 months to stabilize the absorption, if there is an infection in the incision, fat liquefaction, the absorption time will be prolonged, and even need about 1 year to be absorbed; 3, natural absorbable line: for example, collagen line, generally about 1 month after the surgery, it can be completely absorbed. Completely absorbed, degraded in the body mainly through enzymatic degradation, less rejection reaction, better absorption effect, higher biocompatibility.