If the placenta remains in the uterus for 1 year without removal, it is recommended that the woman go to the hospital in time, and under the guidance of the doctor, carry out blood HCG, uterine and double adnexal ultrasound, pelvic magnetic resonance and other examinations to check the situation of the placenta remains, and symptomatic treatment, as follows: 1, follow up and observe: If the woman does not have obvious clinical symptoms, has no requirement for childbearing, and the examination reveals that the placenta remains in the uterus with relatively small tissues, she can be left alone, and follow up and observe can be carried out. Because the placenta remains in the uterus for 1 year, calcification may have occurred, and the uterine mucosa is adhered together; 2, purging: if the woman has obvious abnormal clinical symptoms, such as irregular vaginal bleeding, abdominal pain, fever, secretion abnormalities, etc., or the placenta residual tissues are large, with the requirement of reproduction, it is recommended to carry out the operation of purging to remove the placenta residual material. Women should pay attention to personal hygiene in daily life, keep the vulva clean and dry, and wash the perineum with warm water every day. At the same time, they should pay attention to observe the vaginal secretion, once the secretion is abnormally increased or has a strange odor, it is recommended to go to the hospital in time, to clarify the cause of the disease and then treat the cause of the disease.