An indication of placenta previa includes what symptom?

The symptom of painless bleeding after 20 weeks' gestation is characteristic of placenta previa. This condition occurs when the placenta is abnormally implanted in the lower uterine segment, partially or completely covering the cervix. As the pregnancy progresses and the cervix begins to efface and dilate, this can lead to blood vessels being torn, resulting in vaginal bleeding. The bleeding associated with placenta previa is typically bright red and painless, distinguishing it from other complications of pregnancy that might involve pain or cramping.

Other symptoms, such as painful contractions or increased uterine resting tone, are associated with different conditions, such as placental abruption or labor. Vomiting during the third trimester is not specifically indicative of placenta previa and can occur due to numerous factors unrelated to placental issues. Understanding the symptoms of placenta previa is crucial for timely identification and intervention to ensure the safety of both the mother and the fetus.