Patient's question:
I have an itchy lower body, and my underwear is always yellow. What's going on? What is a placenta previa?Doctor's answer:
If the placenta is attached to the lower segment of the uterus or covers the internal os of the cervix, and its position is lower than the presenting part of the fetus, it is called placenta previa. It may be related to the following factors:① Unhealthy endometrium, postpartum infection, multiple pregnancies, intrauterine device (IUD) insertion, multiple curettage procedures, or cesarean sections, which can cause endometritis, endometrial defects, and insufficient blood supply. To obtain sufficient nutrients, the placenta compensatorily enlarges its area and extends to the lower segment of the uterus.
② Delayed development of the blastocyst, where the trophoblast has not yet developed to the stage capable of implantation by the time it reaches the uterine cavity, leading to continued descent and implantation in the lower segment of the uterus. A large placental area, such as in multiple pregnancies, often extends to the lower segment of the uterus.
To prevent placenta previa, it is essential to practice contraception to avoid multiple pregnancies, avoid unnecessary curettage procedures, especially multiple ones or intrauterine infections, and absolutely avoid illegal and self-induced abortions. These are the main principles for prevention.
After a diagnosis of placenta previa, it is crucial to rest in bed and monitor fetal movements. In cases of significant bleeding, a cesarean section is the only option.