Yellow discharge after amniocentesis is considered to be infection, amniotic fluid leakage, vaginitis and so on. 1. Infection: amniocentesis is a method of prenatal diagnosis, which is an invasive test, there is a certain chance that infection will occur, and the infection will secrete some yellow discharge. 2. Leakage of amniotic fluid: amniocentesis is a procedure that uses a fine needle to pass through the belly and uterine wall of a pregnant woman to enter the amniotic cavity and extract some amniotic fluid. If there is a yellowish secretion after amniocentesis, there may be a small amount of amniotic fluid flowing out through the eye of the needle. 3. Vaginitis: This condition may not have anything to do with amniocentesis, but rather with inflammation of the vagina. After pregnancy, the hormone levels in the body will rise, and the body’s immunity will decline, making it easy for vaginal inflammation to occur, which will also manifest itself as yellow discharge, usually accompanied by itching and other symptoms. There may be other reasons for the yellow discharge after amniocentesis, so it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.